Editing List of naval battles (section)

==20th century==

===[[Boxer Rebellion]] (1899–1901)===
* 1900 [[Battle of the Taku Forts (1900)|Battle of the Taku Forts]] – [[Eight-Nation Alliance]] bombards and captures Chinese coastal forts

===[[Markomannia incident]] (1902)===
* 1902 September 6 – Haitian gunboat [[Haitian gunboat Crête-à-Pierrot|''Crête-à-Pierrot'']] is sunk after an engagement with the German gunboat {{SMS|Panther|1901|6}}

===[[Russo-Japanese War]] (1904–1905)===
* 1904 February 9 [[Battle of Chemulpo Bay|Chemulpo]] – {{ship|Russian cruiser|Varyag|1899}} scuttled during the [[Russo-Japanese War]]
** 9 February [[Battle of Port Arthur|Port Arthur]]
** 15 June [[Hitachi Maru Incident|''Hitachi Maru'' Incident]] – Russian cruisers intercept and sink Japanese transports
** 10 August [[Battle of the Yellow Sea|Yellow Sea]] – Minor Japanese victory over Russia
** 14 August [[Battle of the Japanese Sea|Japanese Sea (Ulsan)]] – Minor Japanese victory over Russia
**20 August [[Battle of Korsakov|Korsakov]]
** 4–5 October [[Dogger Bank incident]] – Russian fleet fires on British trawlers that have been mistaken for Japanese torpedo-boats
** 1905 May 27–28 [[Battle of Tsushima|Tsushima]] – Japanese defeat Russians in large fleet battle between Korea and Japan

===[[Mexican Revolution]] (1910–1920)===
* 1914 March 4 [[First Battle of Topolobampo]] – Constitutionalists gunboat engages two Huertistas gunboats, Constitutionalists forced to retreat
* 1914 March 13 [[Second Battle of Topolobampo]] – Same gunboats clash again, ends in stalemate
* 1914 March 31 [[Third Battle of Topolobampo]] – Same gunboats clash again, Huertistas sink Constitutionalists gunboat
* 1914 April 21 [[United States occupation of Veracruz]] – United States launches amphibious assault and captures Port of [[Veracruz (city)|Veracruz]]
* 1914 June 16 [[Fourth Battle of Topolobampo]] – Having raised their sunken gunboat, the same gunboats clash again, and Huertistas again sink Constitutionalists gunboat

===[[Italo-Turkish War]] (1911–1912)===
* 1911 September 29–30 [[Battle of Preveza (1911)|Preveza]] – Italians defeat Ottomans
* 1912 January 7 [[Battle of Kunfuda Bay|Kunfuda Bay]] – Italians defeat Ottomans
* 1912 February 24 [[Battle of Beirut (1912)|Beirut]] – Italians defeat Ottomans

===[[First Balkan War]] (1912–1913)===
* 1912 November 21 [[Battle of Kaliakra (1912)|Kaliakra]] – Bulgarians defeat Ottoman fleet
* 1912 December 3 [[Naval Battle of Elli|Elli]] – Greeks defeat Ottoman fleet
* 1913 January 18 [[Naval Battle of Lemnos|Lemnos]] – Greeks defeat Ottoman fleet

===[[Second Balkan War]] (1913)===
* 1913 July 14–15 [[Romanian landings in Bulgaria]] – Romanians carry out successful landings in Bulgaria, leading to Bulgaria having to sue for peace two weeks later

===[[World War I]] (1914–1918)===

{| class="wikitable" style="width:100%; font-size:95%; text-align:left;"
|-
!Year
!Date
!Battle
!Description
|-
|1914–1918
|
|[[U-boat Campaign (World War I)|U-boat campaign]]
|Actions throughout the war by the German U-boat Arm against Allied shipping
|-
|1914
|4–10 August
|[[Pursuit of Goeben and Breslau]]
|Bloodless engagement – British fleet pursuits German battlecruiser [[SMS Goeben|SMS ''Goeben'']] and light cruiser [[SMS Breslau|SMS ''Breslau'']], fails to intercept them and they escape to Constantinople.
|- valign="top"
|
|16 August
|[[Battle of Antivari]]
|French and British force sinks Austrian cruiser in the Adriatic
|-
|
|26 August
|[[Sinking of SS Kaiser Wilhelm der Grosse|Battle of Río de Oro]]
|British cruiser [[HMS Highflyer (1898)|HMS ''Highflyer'']] intercepts and sinks German merchant raider, [[SS Kaiser Wilhelm der Grosse|SMS ''Kaiser Wilhelm der Grosse'']]
|-
|
|27 August – 7 November
|[[Siege of Tsingtao]]
|British and Japanese fleet destroy German and Austro-Hungarian colonial fleet and coastal defenses around Tsingtao, then launch amphibious assault, eventually capturing the city.
|-
|
|28 August
|[[Battle of Heligoland (1914)|Battle of Heligoland Bight]]
|British [[Grand Fleet]] ambushes and sinks German ships on patrol off Germany's coast; led Germany to pursue a [[fleet in being]] strategy for most of the rest of the war
|-
|
|14 September
|[[SMS Cap Trafalgar|Sinking of SMS ''Cap Trafalgar'']]
|British merchant raider, [[RMS Carmania (1905)|HMS ''Carmania'']] encounters and sinks German merchant raider [[SMS Cap Trafalgar|SMS ''Cap Trafalgar'']], which in turn was disguised as ''Carmania''.
|-
|
|20 September
|[[Battle of Zanzibar]]
|German cruiser [[SMS Königsberg (1905)|SMS ''Königsberg'']] sinks British cruiser [[HMS Pegasus (1897)|HMS ''Pegasus'']]
|-
|
|22 September
|[[Action of 22 September 1914]]
|German U-boat [[SM U-9|SM ''U-9'']] ambushes and sinks three British armored cruisers
|-
|
|22 September
|[[Bombardment of Madras]]
|German cruiser [[SMS Emden|SMS ''Emden'']] destroys Indian oil refinery in Madras and sinks one merchant ship
|-
|
|22 September
|[[Bombardment of Papeete]]
|German armored cruisers [[SMS Scharnhorst|SMS ''Scharnhorst'']] and [[SMS Gneisenau|SMS ''Gneisenau'']] destroy French coastal defenses in French Polynesia and sink the French gunboat [[French gunboat Zélée|''Zélée'']] and a freighter
|-
|
|1 October – 11 July 1915
|[[Battle of Rufiji Delta]]
|German cruiser [[SMS Königsberg (1905)|SMS ''Königsberg'']] is blockaded in the Rufiji River delta by a British fleet, holds out for months before being sunk by monitors [[HMS Mersey (1914)|HMS ''Mersey'']] and [[HMS Severn (1914)|''Severn'']]
|-
|
|17 October
|[[Battle off Texel]]
|British fleet repels attack by four German torpedo boats, sinking all four.
|-
|
|28 October
|[[Battle of Penang]]
|SMS ''Emden'' sinks Russian cruiser ''Zhemchug'' and French destroyer in Penang harbour
|-
|
|29 October
|[[Black Sea raid]]
|Ottoman war minister [[Enver Pasha]] instigates the Ottoman entry into the war with raids on Russian ports
|-
|
|1 November
|[[Battle of Coronel]]
|German cruisers under [[Maximilian von Spee|von Spee]] defeat a British cruiser force off the coast of Chile; German victory
|-
|
|3 November
|[[Raid on Yarmouth]]
|German battlecruiser squadron attempts to bombard British city of Yarmouth, intercepted by British destroyers. German cruiser [[SMS Yorck|SMS ''Yorck'']] and British submarine [[HMS D5|HMS ''D5'']] are sunk by mines, and are the only losses of the action
|-
|
|9 November
|[[Battle of Cocos]]
|[[HMAS Sydney (1912)|''HMAS Sydney'']] intercepts and forces the beaching of [[SMS Emden (1906)|''SMS Emden'']]; Australian victory
|-
|
|18 November
|[[Battle of Cape Sarych]]
|Two Ottoman warships clash with five Russian pre-dreadnoughts
|-
|
|8 December
|[[Battle of the Falkland Islands]]
|British battlecruiser force virtually wipes out von Spee's squadron.
|-
|
|16 December
|[[Raid on Scarborough, Hartlepool and Whitby]]
|German battlecruiser squadron successfully bombards several British ports, British fleet intercepts, but little damage is done in battle, neither side losses ships
|-
|
|25 December
|[[Raid on Cuxhaven]]
|British airships launch air raid on German port of Cuxhaven, causing major damage. German U-boats pursuit the fleeing airships, but fail to stop them
|-
|- valign="top"
|1915
|24 January
|[[Battle of Dogger Bank (1915)|Battle of Dogger Bank]]
|''Blucher'' sunk by British battlecruisers in the North Sea.
|-
|
|19 February
|[[Naval operations in the Dardanelles Campaign]]
|Mainly carried out by the [[Royal Navy]] with substantial support from the French and minor contributions from Russia and Australia against Ottoman Empire and ended with Turkish victory
|-
|
|15 March
|[[Battle of Más a Tierra]]
|British cruisers pursuit, corner, and sink German cruiser [[SMS Dresden (1907)|SMS ''Dresden'']]
|-
|
|1 May
|[[Battle off Noordhinder Bank]]
|Two German torpedo boats sunk by British destroyers
|-
|
|1 May
|[[SS Gulflight|Attack on SS ''Gulflight'']]
|German submarine [[SM U-30 (Germany)|SM ''U-30'']] torpedoes the then-neutral American oil tanker [[SS Gulflight|SS ''Gulflight'']], but fails to sink her. Causes an international incident.
|-
|
|7 May
|[[Sinking of the RMS Lusitania|Sinking of the RMS ''Luistania'']]
|German submarine [[SM U-20 (Germany)|SM ''U-20'']] torpedoes and sinks the British ocean liner, [[RMS Lusitania|RMS ''Lusitania'']] killing 1193 civilians, turns international opinion against Germany
|-
|
|10 May
|[[Action of 10 May 1915]]
|[[Russian empire|Russian]] and [[Ottoman Empire|Ottoman]] ships clash near the [[Bosporus]]
|-
|
|23–24 May
|[[Bombardment of Ancona]]
|Austro-Hungarian fleet bombards Italian port of Ancona and damages an Italian destroyer
|-
|
|23–24 May
|[[SMS Tátra|Action off Vieste]]
|Austro-Hungarian squadron launches raid against Italian port of Vieste, intercepted by Italian cruisers and destroyers. Austro-Hungarians succeed in sinking an Italian destroyer.
|-
|
|24 May
|[[Raid on Porto Buso]]
|Italian destroyer [[Nembo-class destroyer|''Zeffiro'']] raids and captures Austro-Hungarian naval base.
|-
|
|2 July
|[[Russian raid on Gotland]]
|Russian cruiser squadron intercepts German cruiser force laying mines off the [[Åland]] Islands. German mine-laying cruiser ''[[Albatross]]'' sunk and cruisers ''Roon'' and ''Prince Adalbert'' damaged.
|-
|
|8-20 August
|[[Battle of the Gulf of Riga]]
|Russian fleet successfully prevents German fleet from breaking into the Gulf of Riga
|-
|
|19 August
|[[Baralong incidents|First ''Baralong'' incident]]
|British Q-ship, [[HMS Baralong|HMS ''Baralong'']] intercepts and sinks German U-boat [[SM U-27 (Germany)|SM ''U-27'']]
|-
|
|24 August
|[[Baralong incidents|Second ''Baralong'' incident]]
|British Q-ship, [[HMS Baralong|HMS ''Baralong'']] intercepts and sinks German U-boat [[SM U-41 (Germany)|SM ''U-41'']]
|-
|
|10 December
|[[Battle of Kirpen Island]]
| Two Ottoman gunboats sunk by Russian destroyers
|-
|
|26 December-July 1916
|[[Battle of Lake Tanganyika]]
| British, Belgians, and Germans battle for control of Lake Tanganyika
|-
|
|28-29 December
|[[Battle of Durazzo (1915)|First Battle of Durazzo]]
|Allied fleet defeats Austro-Hungarian fleet off Albania
|-
|1916
|8 January
|[[Action of 8 January 1916]]
|Russian and Ottoman ships encounter each other in the black sea, have a brief exchange of fire then withdraw
|-
|
|16 January
|[[SMS Möwe (1914)|Action of 16 January 1916]]
|German merchant raider [[SMS Möwe (1914)|SMS ''Möwe'']] sinks British cargo ship off Maedeira
|-
|
|10 February
|[[Battle of Dogger Bank (1916)|Second Battle of Dogger Bank]]
|German torpedo boat flotilla sorties and engages a British sloop flotilla, sinking [[HMS Arabis (1915)|HMS ''Arabis'']]
|-
|
|29 February
|[[Action of 29 February 1916]]
|The Royal Navy dispatches ships to destroy a German [[Commerce raiding|commerce raider]] in the North sea, successfully sinking it with the loss of one armed merchant cruiser.
|-
|
|24 April
|[[Bombardment of Yarmouth and Lowestoft]]
|German battlecruiser squadron shells British ports, intercepted by small British fleet, minimal losses for both sides
|-
|
|31 May – 1 June
|[[Battle of Jutland]]
|Inconclusive two-day battle between the main British and German fleets, largest and only such engagement of World War I.
|-
|
|19 August
|[[Action of 19 August 1916]]
|Attempted reengagement of main British and German fleets, results in only minor skirmish
|-
|
|27 August
|[[Raid on Ruse]]
|Romanian torpedo boats attack an Austrian flotilla in Bulgaria
|-
|
|26–27 October
|[[Battle of Dover Strait (1916)]]
|German torpedo boats launch a raid into the [[Dover straight]] to disrupt shipping
|-
|1917
|10 March
|[[Action of 10 March 1917]]
|German merchant raider [[SMS Möwe (1914)|SMS ''Möwe'']] sinks two New Zealand cargo ships
|-
|
|16 March
|[[Action of 16 March 1917]]
|British cruiser [[HMS Achilles (1905)|HMS ''Achilles'']] sinks German merchant raider [[SMS Leopard (1917)|SMS ''Leopard'']]
|-
|
|7 April
|[[Scuttling of SMS Cormoran|Scuttling of SMS ''Cormoran'']]
|United States Navy blocks the German merchant raider {{SMS|Cormoran|1914|6}} at port, but her crew scuttles the ship before it can be captured
|-
|
|21 April
|[[Battle of Dover Strait (1917)]]
| Destroyer battle.
|-
|
|4 May
|[[Action of 4 May 1917]]
|Australian cruiser [[HMAS Sydney (1912)|HMAS ''Sydney'']] engages the German airship ''LZ92'', neither side suffers casualties
|-
|
|15 May
|[[Battle of the Strait of Otranto (1917)]]
| Austro-Hungarian fleet attacks Allied fleet in attempt to break blockade
|-
|
|12–20 October
|[[Operation Albion]]
|German fleet engages and defeats Russian fleet, successfully lands and occupies West Estonian archipelago
|-
|
|15 October
|[[Action of 15 October 1917]]
|American destroyer, [[USS Cassin (DD-43)|USS ''Cassin'']] engages and damages German U-boat [[SM U-61|SM ''U-61'']]
|-
|
|17 October
|[[Battle of Moon Sound]]
|German and Russian forces clash in the Baltic Sea.
|-
|
|17 October
|[[Action off Lerwick]]
|German cruisers [[SMS Brummer|SMS ''Brummer'']] and [[SMS Bremse|SMS ''Bremse'']] attack a British convoy off the Shetland Islands, sinking most of it.
|-
|
|17 November
|[[Second Battle of Heligoland Bight]]
| Clash between British and German squadrons during mining operation
|-
|
|17 November
|[[Action of 17 November 1917]]
|Two American destroyers sink German submarine [[SM U-58|SM ''U-58'']]
|- valign="top"
|1918
|20 January
|[[Battle of Imbros (1918)|Battle of Imbros]]
| Ottomans and British fight off Imbros in the Aegean.
|-
|
|23 April
|[[Zeebrugge Raid]]
|Royal Navy attempts to scuttle ships in Zeebrugge channel to prevent Germans from reaching open water, operation fails
|-
|
|23–24 April
|[[First Ostend Raid]]
|Royal Navy attempts to scuttle ships in Ostend channel to prevent Germans from reaching open water, operation fails
|-
|
|8 May
|[[SM U-32 (Germany)|Action of 8 May 1918]]
|German submarine [[SM U-32 (Germany)|SM ''U-32'']] is sunk by depth charges from HMS ''Wallflower''
|-
|
|9 May
|[[Second Ostend Raid]]
|Royal Navy attempts to scuttle ships in Ostend channel to prevent Germans from reaching open water, operation fails
|-
|
|21 May
|[[USS Christabel (SP-162)|Action of 21 May 1918]]
|American patrol ship [[USS Christabel (SP-162)|USS ''Christabel'']] engages and sinks the German submarine [[SM UC-56|SM ''UC-56'']]
|-
|
|2 June
|[[SS Carolina|Sinking of SS ''Carolina'']]
|German submarine [[SM U-151|SM ''U-151'']] sinks American passenger liner [[SS Carolina|SS ''Carolina'']]
|-
|
|10 June
|[[SMS Szent István|Sinking of the SMS ''Szent István'']]
|Italian torpedo boat ''MAS-15'' torpedoes and sinks Austro-Hungarian battleship SMS ''Szent István''
|-
|
|18 June
|[[SS Dwinsk|Action of 18 June 1918]]
|German submarine [[SM U-151|SM ''U-151'']] torpedoes and damages the British cargo ship [[SS Dwinsk|SS ''Dwinsk'']], submarine is later engaged by American transport [[SS Kronprinz Wilhelm|USS ''Von Stuben'']], but escapes
|-
|
|19 July
|[[Tondern raid]]
|British aircraft carrier, [[HMS Furious (47)|HMS ''Furious'']] launches air raid on German airfield in Todern
|-
|
|21 July
|[[Attack on Orleans]]
|German submarine [[SM U-156|SM ''U-156'']] attacks a group of barges off Massachusetts
|-
|
|25 August
|[[Brazil during World War I|Action of 25 August 1918]]
|Brazilian fleet sailing from Freetown to Dakar is attacked by German U-boats, but suffer no losses. Brazilians successfully counterattack, sinking one U-boat.<ref>Maia, Prado (1961). D.N.O.G. (Divisão Naval em Operações de Guerra), 1914–1918: uma página esquecida da história da Marinha Brasileira. Serviço de Documentação Geral da Marinha.</ref>
|-
|
|2 October
|[[Battle of Durazzo (1918)|Second Battle of Durazzo]]
|Allied fleet attacks Austro-Hungarian fleet and coastal defenses in Durazzo, Albania, decimating the city
|-
|
|14 October
|[[Action of 14 October 1918]]
|Portuguese patrol ship [[NRP Augusto de Castilho|NRP ''Augusto de Castilho'']] is sunk by the German submarine [[SM U-139|SM ''U-139'']] while defending a merchant ship
|-
|
|31 October – 1 November
|[[Raid on Pula]]
|Italian frogmen sink the Austro-Hungarian battleship, [[SMS Viribus Unitis|SMS ''Viribus Unitis'']], without knowing it had just been transferred to the [[State of Slovenes, Croats, and Serbs]] the day prior
|-
|}

===[[Russian Civil War]] (1917–1922)===

* 1918
** 16 August [[Battle of Lake Baikal]] – ships commandeered by the [[Czechoslovak Legion]] defeat Bolshevik ships on [[Lake Baikal]]
** 15 February–September [[Invasion of Åland]] – German, Swedish, and Finnish forces invade [[Åland]]
** 28–4 November 1919 [[British campaign in the Baltic (1918–1919)|British Baltic Campaign]]
* 1919
** 21 May [[Battle of Alexandrovsky Fort]] – British fleet defeats Bolshevik fleet
** 18 August [[Raid on Kronstadt]] – British [[Coastal motor boat|motor torpedo boats]] damage a Bolshevik battleship and sink an old cruiser for the loss of three boats
* 1920
** 3 May [[Action of 3 May 1920]] – French sloop ''Le Scarpe'' captured by Soviet floating battery ''Krasnaya Zarya''
** 18 May [[Anzali Operation]] – Bolshevik fleet captures ten White Russian auxiliary cruisers under British control
** 15 September [[Battle of Obytichnyi Spit]] – White and Red gunboat squadrons engage each other, resulting in a stalemate
* 1921
** 9 January [[Action of 9 January 1921]] – Two French destroyers sink a Bolshevik gunboat

===[[Turkish War of Independence]] (1919–1922)===
*1921
** 8 February – [[Alemdar (ship)|Action of 8 February 1921]] – Turkish tugboat [[Alemdar (ship)|''Alemdar'']] engages the French gunboat, ''C-27'', successfully damaging her and forcing her to retreat.

===[[Irish Civil War]] (1922–1923)===
* 1922
** 29 March – Capture of the ''Upnor'' – [[Irish Republican Army]] tugboat, ''Warrior'' captures the British cargo ship, SS ''Upnor'', which was carrying weapons.<ref>{{cite web | url=https://www.independent.ie/irish-news/the-daring-capture-of-a-british-naval-ship-that-enraged-downing-street-and-armed-anti-treaty-ira-for-civil-war/42426755.html | title=The daring capture of a British naval ship that enraged Downing Street and armed anti-Treaty IRA for Civil War | date=11 April 2023 }}</ref>

===[[Colombia-Peru War]] (1932–1933)===

*1933
** 14–15 February [[Battle of Tarapacá (1933)|Battle of Tarapacá]] – Colombian river fleet bombards Peruvian river defenses, comes under fire by Peruvian seaplane fighters, but is repelled.

===[[Chaco War]] (1932–1935)===
* 1932
** 22 December [[ARP Tacuary|Battle of Bahía Negra]] – Paraguayan gunboat, [[ARP Tacuary|ARP ''Tacuary'']], comes under attack by Bolivian fighters

===[[Spanish Civil War]] (1936–1939)===

* 1936
** 5 August [[Convoy de la Victoria]] – Republican destroyer ''Alcalá Galiano'' intercepts a Nationalist convoy but fails to stop it
** 8 August – Action of 8 August 1936 –  Nationalist cruiser [[Spanish cruiser Almirante Cervera|''Almirante Cervera'']] sank British yacht ''Blue Shadow'' while shelling Republican positions.
** 16 August-12 September [[Battle of Majorca]] – Republicans launch amphibious assault on Nationalist-held Majorca but fails
** 19 September [[1936 uprising in Spanish Guinea|Spanish Guinea uprising]] – Nationalist merchant raider sinks a Republican prison ship
** 29 September [[Battle of Cape Espartel]] – Nationalists cruisers sink Republican destroyer ''[[Spanish destroyer Almirante Ferrándiz (1928)|Almirante Ferrándiz]]''.
** 14 December – Action of 14 December 1936 – Soviet merchant ship ''Komsomol'' is sunk by Nationalist cruiser ''Canarias''.
* 1937
** 10 January – Action of 10 January 1937 – Soviet merchant ship ''Smidovich'' is captured by Nationalist destroyer {{ship|Spanish destroyer|Velasco||2}}.
** 5 March [[Battle of Cape Machichaco]] – Nationalist heavy cruiser {{ship|Spanish cruiser|Canarias||2}} defeats a [[Basque Auxiliary Navy]] squadron
** 28 March – Action of 28 March 1937 – Greek merchant ship ''Gardelaki'' is captured by Nationalist patrol ship ''Uad Kert''.
** 2 April – Action of 2 April 1937 – Greek merchant ship ''Poli'' is sunk by Nationalist heavy cruiser ''Baleares''.
** 4 April – Action of 4 April 1937 – Panamanian merchant ship ''Janu'' is captured by Nationalist patrol ship ''Huelva''.
** 5 April – Action of 5 April 1937 – Greek merchant ship ''Nagos'' is captured by Nationalist patrol ship ''Maria Teresa''.
** 6 April – Action of 6 April 1937 – Panamanian merchant ship ''Andra'' is sunk by Nationalist armed trawler ''Galerna''.
** 16 April – Action of 16 April 1937 – Panamanian merchant ship ''Hordena'' is captured by Nationalist light cruiser ''Almirante Cervera''.
** 24 May [[Italian auxiliary cruiser Barletta|Attack on the ''Barletta'']] – Republican aircraft attack the Italian merchant raider ''Barletta'', killing six Italian sailors
** 26 May [[German torpedo boat Albatros|Attack on the ''Albatros'']] – Republican aircraft attack the German destroyer ''Albatros'' with no casualties
** 29 May [[Deutschland incident (1937)|''Deutschland'' incident]] – Republican aircraft attack the German cruiser ''Deutschland'', killing 31 and injuring 74 of her crew
** 31 May [[Bombardment of Almería]] – Kriegsmarine squadron led by [[German cruiser Admiral Scheer|''Admiral Scheer'']] bombards the Republican port of Almería in retaliation for an attack on the cruiser ''Deutschland''
** 14 July – Nationalist cruiser ''Almirante Cervera'', assisted by the naval trawler ''Galerna'', seized the British cargo ship ''Molton'' off Santander, inside Spanish waters, despite the presence of the British battleship {{HMS|Royal Oak|08|2}}.
** 7 July – Action of 7 July 1937 – French merchant ship ''Liberte'' is captured by Nationalist cruiser ''Almirante Cervera''.
** 15 August – Action of 15 August 1937 – Panamanian merchant ship ''Geo McKnight'' is disabled by the [[Italian destroyer Freccia (1930)|Italian destroyer ''Freccia'']].
** 31 August – Action of 31 August 1937 – Soviet merchant ship ''Timiryazev'' is sunk by the [[Italian destroyer Turbine (1927)|Italian destroyer ''Turbine'']].
** 1 September – Action of 1 September 1937 – British merchant ship ''Woodford'' is sunk by the [[Italian submarine Diaspro|Italian submarine ''Diaspro'']].
** 3 September – Action of 3 September 1937 – Soviet merchant ship ''Blagoev'' is sunk by the [[Italian submarine Luigi Settembrini|Italian submarine ''Luigi Settembrini'']].
** 7 September [[Battle of Cape Cherchell]] – Nationalist cruiser [[Spanish cruiser Baleares|''Baleares'']] destroys a Republican convoy.
** 12 December – Action of 12 December 1937 – French merchant ship ''Sydney'' is captured by Nationalist merchant raider ''Lazaro''.
** 21 December – Action of 21 December 1937 – French merchant ship ''Francois'' is captured by Nationalist merchant raider ''Mallorca''.
* 1938
** 21 January – Sinking of the ''Endymion'' – British merchant ship ''Endymion'' is sunk by Nationalist submarine [[Italian submarine Archimede (1933)|''General Sanjurjo'']].
** 21 January – Capture of the ''Pomaron'' – Estonian merchant ship ''Pomaron'' is captured by Nationalist merchant raider ''Vincente Puchol''.
** 22 January – Action of 22 January 1938 – Estonian merchant ship ''Juss'' is captured by Nationalist merchant raider ''Mallorca''.
** 5–6 March [[Battle of Cape Palos (1938)|Battle of Cape Palos]] – Republican squadron sinks Nationalist cruiser ''Baleres''.
** 19 March – Action of 19 March 1938 – Soviet merchant ship ''Lensovet'' is captured by Nationalist patrol ships.
** 30 March – Sinking of the ''Lena'' – Greek merchant ship ''Lena'' is sunk by Nationalist submarine ''General Mola''.
** 30 March – Capture of the ''Alix'' – Norwegian merchant ship ''Alix'' is captured by Nationalist patrol ship ''Huevla''.
** 19 May – Action of 19 May 1938 – Greek merchant ship ''Ellinico Vuono'' is captured by Nationalist cruiser ''Canarias''.
** 26 May – Capture of the ''Stepanov'' – Soviet merchant ship ''Skvortzov Stepanov'' is captured by Nationalist cruiser ''Canarias''.
** 26 May – Capture of the ''Jan'' – Danish merchant ship ''Jan'' is captured by Nationalist patrol ship ''Inasi''.
** 30 May – Action of 30 May 1938 – Panamanian merchant ship ''Wintonia'' is captured by a squadron of Nationalist cruisers.
** 31 May – Action of 31 May 1938 – Soviet merchant ship ''Potishev'' is captured by Nationalist merchant raider ''Vincente Puchol''.
** 21 July – Action of 21 July 1938 – Norwegian merchant ship ''Skulda'' is captured by Nationalist patrol ships.
** 17 October – Action of 17 October 1938 – Soviet merchant ship ''Katayama'' is captured by Nationalist minelayer ''Vulcano''.
** 23 October – Action of 23 October 1938 – Soviet merchant ship ''Tsyurupa'' is captured by Nationalist cruiser ''Almirante Cervera''.
** 2 November – Action of 2 November 1938 – Soviet merchant ship ''Max Hoels'' is captured by Nationalist minelayer ''Vulcano''.
** 9 November – Action of 9 November 1938 – Greek merchant ship ''Nicolau Eleni'' is captured by Nationalist patrol ships.
** 11 November – Capture of the ''Victoria'' – Greek merchant ship ''Victoria'' is captured by Nationalist merchant raider ''Mar Cantabrico''.
** 11 November – Sinking of the ''Hanna'' – Dutch merchant ship ''Hanna'' is sunk by Nationalist submarine ''General Mola''.
** 19 November – Action of 19 November 1938 – Latvian merchant ship ''Everards'' is captured by Nationalist patrol ships.
* 1939
** 15 January – Action of 15 January 1939 – French merchant ship ''Aunis'' is captured by Nationalist gunboat ''Deto''.
** 28 January – Action of 28 January 1939 – British merchant ship ''Lake Lugano'' is sunk by Nationalist merchant raider [[MV Mar Negro|''Mar Negro'']].

===[[Second Sino-Japanese War]] (1937–1945)===
* 1937
** 7 August–25 September [[Battle of Shanghai]] – Japanese cruisers and carrier-based aircraft destroy the Republic of China fleet in the Yangtze River.<ref>{{Cite web |title=Naval War in China |url=http://www.combinedfleet.com/Destruction.htm |access-date=2024-02-19 |website=www.combinedfleet.com}}</ref>
* 1938
** 11 June-28 October [[Battle of Wuhan]] – Chinese gunboats see minor action against the Japanese fleet.

===[[Ecuadorian-Peruvian War]] (1941)===
* 1941 25 July – [[Ecuadorian-Peruvian War|Battle of Guayaquil]] – Ecuadorian gunboat [[BAE Abdón Calderón|BAE ''Abdón Calderón'']] engages the Peruvian destroyer [[:es:BAP Almirante Villar|BAP ''Almirante Villar'']], damaging her and forcing her  to retreat.

===[[Italian Invasion of Albania]] (1939)===
* 1939 7 April [[Battle of Durrës (1939)|Battle of Durrës]] – Patrol boats of the [[Albanian Navy]] and coastal artillery engage an [[Regia Marina|Italian naval]] squadron.

===[[Winter War]] (1939–1940)===
* 1939 
** 1 December [[Russarö|Battle of Russarö]] – Soviet heavy cruiser ''Kirov'' and escorting destroyers exchange fire with Finnish coastal defenses. Finnish coastal guns damage Soviet warships, forcing their retreat.
** 14 December [[Utö (Finland)|Battle of Utö]] – Two Soviet destroyers attack a Finnish lighthouse. Finnish coastal defenses repel Soviet destroyers.
** 18 December [[Beryozovye Islands|Battle of the Beryozovye Islands]] – Soviet battleships ''Marat'' and ''Oktyabrskaya Revolutsiya'' exchange fire against Finnish coastal defenses at key forts.

===[[World War II]] (1939–1945)===
* 1939–1945 [[Battle of the Atlantic (1939–1945)]]
* 1939
** 1 September [[Battle of Danzig Bay|Danzig Bay]] – German Stuka dive bombers destroy much of the Polish Navy
** 1–3 September [[Battle of Hel]] – Surviving Polish warships engage German invasion fleet. All Polish ships are sunk or captured.
** 1–25 September [[Worek Plan]] – Polish submarines attempt to defend coast against German landings.
** 13 December [[Battle of the River Plate|River Plate]] – British and New Zealand cruisers engage the German heavy cruiser [[German cruiser Admiral Graf Spee|''Admiral Graf Spee'']]. Damaged, she is later scuttled.
* 1940
** 8 April [[HMS Glowworm (H92)|Action of 8 April 1940]] – The German cruiser ''[[German cruiser Admiral Hipper|Admiral Hipper]]'' sinks the destroyer {{HMS|Glowworm|H92|6}} off of Norway
** 8 April Sinking of the ''Rio de Janeiro'' – German transport ship [[SS Rio de Janeiro (1914)|SS ''Rio de Janeiro'']] is sunk by the Polish submarine [[ORP Orzel (1938)|ORP ''Orzel'']].
** 9 April [[Battles of Narvik#Naval battle preceding the first naval battle of Narvik|Preceding Battle of Narvik]] – Flotilla of German destroyers engage and sink Norwegian coastal defense ships [[HNoMS Norge|HNoMS ''Norge'']] and [[HNoMS Eidsvold|HNoMS ''Eidsvold'']]
** 9 April [[Battle of Drøbak Sound]] Norwegian coastal defenses at [[Oscarsborg Fortress]] sink the German heavy cruiser [[German cruiser Blücher|''Blücher'']]
** 9 April [[Action off Lofoten]] German battleships ''Scharnhorst'' and ''Gneisenau'' engage British battlecruiser HMS ''Renown'' and her group of destroyers. No ship is lost and only suffers minimal damage, first engagement between capital ships of the war.
** 9 April [[Battle of Horten Harbour]] – [[German cruiser Emden|German cruiser ''Emden'']] and destroyers assault Norwegian naval base in Horten. Norwegian minesweepers attempt to defend the base, but fail.
** 9 April [[Battle of Kristiansand (1940)|Battle of Kristiansand]] – [[German cruiser Karlsruhe|German cruiser ''Karlsruhe'']] and supporting destroyers engage Norway's Odderøya coastal defense fortress. Fortress is later captured by German marines, while the fortress sinks the German transport ship [[MS Seattle|MS ''Seattle'']].
** 9 April [[Capture of Arendal]] – [[German torpedo boat Greif|German torpedo boat ''Greif'']] confronts the Norwegian [[2.-class torpedo boat]], HNoMS ''Jo'' in a bloodless engagement. ''Jo'' and the rest of the Norwegian defenders surrender the Port of Arendal. 
** 10 April [[Battles of Narvik#Second naval Battle of Narvik|First Battle of Narvik]] – British destroyer flotilla sinks two German destroyers and a flotilla of merchant ships
** 13 April [[Battles of Narvik#Second naval Battle of Narvik|Second Battle of Narvik]] – [[HMS Warspite (03)|HMS ''Warspite'']] and a force of supporting destroyers sinks all remaining German destroyers in Narvik.
** 26 May – 4 June [[Dunkirk evacuation]]
** 8 June [[Operation Juno]] – German battleships ''Gneisenau'' and ''Scharnhorst'' sink the aircraft carrier HMS ''Glorious'' and two destroyers off Norway
** 10–25 June [[Italian invasion of France]] – French and Italian naval forces skirmish in the opening hours of the invasion
** 14–15 June [[Convoy HX 47]] – Two German U-boats attack British convoy, sinking two merchant ships.
** 21–22 June [[Convoy HX 49]] – Three German U-boats attack British convoy, sinking three merchant ships.
** 28 June [[Battle of the Espero Convoy]] British cruiser [[HMS Orion (85)|HMS ''Orion'']] sinks Italian destroyer [[Italian destroyer Espero (1927)|''Espero'']]
** 3 July [[Destruction of the French Fleet at Mers-el-Kebir|Mers-el-Kebir]] – British fleet attacks French fleet in harbour in Algeria
** 3–6 July [[Convoy OA 178]] – German Stuka's attack British convoy, sinking several merchant ships and damaging more. 
** 9 July [[Battle of Calabria|Calabria (Punta Stilo)]] – British fleet attacks Italian fleet
** 19 July [[Battle of Cape Spada|Cape Spada]] – [[HMAS Sydney (1934)|HMAS ''Sydney'']] sinks Italian cruiser ''Bartolomeo Colleoni'' off Crete
** 24–27 August [[Convoy HX 65]] – 8 ships sunk in North Atlantic. First Canadian action of the war. 
** 25 August – Sinking of the ''Elli'' – Italian submarine [[Italian submarine Delfino (1930)|''Delfino'']] sinks the Greek cruiser [[Greek cruiser Elli (1912)|RHS ''Elli'']]
** 3–5 September [[Convoy FS 271]] – German E-boats attack British convoy, sinking five merchant ships. 
** 6–9 September [[Convoy SC 2]] – German U-boats attack Allied convoy, sinking three merchant ships.
** 20–22 September [[Convoy HX 72]] – 11 ships sunk in the North Atlantic.
** September 23–35 [[Battle of Dakar|Dakar]] – Vichy French fight off a British/Free French landing at [[Dakar]]
** 12 October [[Battle of Cape Passero (1940)|Battle of Cape Passero]] – British cruisers HMS ''Ajax'' and HMS ''York'' engage and sink three Italian destroyers.
** 16–19 October [[Convoy SC 7]] – 20 ships sunk in North Atlantic
** 19–20 October [[Convoy HX 79]] – 12 ships sunk in North Atlantic
** 20–21 October [[Attack on Convoy BN 7]] – Allied fleet engages a flotilla of Italian destroyers, sinking one of them
**5 November [[Convoy HX 84]] – 5 ships sunk in North Atlantic
** 9 November [[Battle of Gabon]] – Free French aviso [[French aviso Savorgnan de Brazza|''Savorgnan de Brazza'']] sinks Vichy French aviso [[French aviso Bougainville|''Bougainville'']] 
** 11 November [[Battle of Taranto|Taranto]] – British air attack on Italians anchored at Taranto, inspiring the Japanese attack on Pearl Harbor
** 12 November [[Battle of the Strait of Otranto (1940)|Strait of Otranto]] – British and Australian ships engage and destroy an Italian convoy.
** 27 November [[Battle of Cape Spartivento|Cape Spartivento (Cape Teulada)]] – British fight back an Italian interception
** 30 November – 27 December [[Operation Nordseetour]] – German cruiser ''Admiral Hipper'' carry's out raids in the North Atlantic, sinking a merchant vessel and damaging two British cruisers. 
** 1–3 December [[Convoy HX 90]] – 11 ships sunk in North Atlantic
** 6–8 December and 27 December [[German attacks on Nauru]] – German merchant raiders destroy Allied merchant ships off Nauru.
* 1941
** 10–11 January [[Operation Excess]] – Royal Navy engages maritime strike Luftwaffe
** 12 January-2 February [[Convoy SC 19]] – German U-boats intercept Allied convoy, sink four merchant ships.
** 17 January [[Battle of Ko Chang|Ko Chang]] – Vichy France defeats Thailand
** 22 January – 22 March [[Operation Berlin (Atlantic)|Operation Berlin]] – ''Scharnhorst'' and ''Gneisenau'' sink and capture 22 British merchant ships.
** 22 January-8 February [[Convoy SC 20]] – German U-boats intercept Allied convoy, sink five merchant ships.
** 30 January-18 February [[Convoy HX 106]] – German U-boats attack British convoy, sinking two merchant ships.
** 31 January [[Attack on Convoy AN 14]] – Italian destroyers intercept an Allied convoy, disabling a merchant ship
** 8–11 February [[Convoy HG 53]] – 9 ships sunk and 1 German [[Fw 200 Condor]] shot down
** 25–28 February [[Operation Abstention]] – British attempt to land on the Italian-occupied Greek island of [[Kastelorizo]], but are repelled by Italian naval and air forces
** 27 February [[Action of 27 February 1941]] – New Zealand cruiser [[HMNZS Leander|HMNZS ''Leander'']] sinks Italian merchant raider [[Italian auxiliary cruiser Ramb I|''Ramb I'']]
** 2–8 March [[Convoy OB 293]] – 3 ships and 2 U-boats sunk in North Atlantic
** 4 March [[Operation Claymore]] – British destroyers and commandos raid a fish oil plant in occupied-Norway, sinking several German merchant ships
** 15–17 March [[Convoy HX 112]] – German U-boats attack Allied convoy, Allies suffer minimal losses and sink two U-boats.
** 26 March [[Raid on Souda Bay]] – Italian destroyers launch explosive motor boats which sink British cruiser HMS ''York'' and Norwegian tanker ''Pericles''
** 28 March [[Battle of Cape Matapan|Cape Matapan]] – British fleet defeats Italian fleet in night action
** 2–5 April [[Convoy SC 26]] – 10 ships sunk and 1 U-boat destroyed in North Atlantic
** 4 April – [[Action of 4 April 1941]] – German merchant raider [[German auxiliary cruiser Thor|''Thor'']] engages and sinks British merchant raider HMS ''Voltair'' off Cape Verde
** 6 April – Action of 6 April 1941 – British cruiser [[HMS Capetown (D88)|HMS ''Capetown'']] is torpedoed by Italian MAS boat ''MAS-213'', damaging her.
** 16 April – [[Battle of the Tarigo Convoy]] ''Duisburg''. ''Lampo'', ''Tarigo'' and'' Baleno'' are sunk, as well as [[HMS Mohawk (F31)|HMS ''Mohawk'']]
** 7–10 May [[Convoy OB 318]] – 7 ships sunk and 1 U-boat captured in North Atlantic
** 8 May – [[Action of 8 May 1941]] – British cruiser [[HMS Cornwall (56)|HMS ''Cornwall'']] engages and sinks the German merchant raider [[German auxiliary cruiser Pinguin|''Pinguin'']]
** 10–28 May [[Convoy HX 126]] – Nine German U-boats attack British convoy and sink nine merchant ships. 
** 21 May – 1 June – [[Battle of Crete]] – Royal Navy loses three cruisers and 6 destroyers to Axis air attacks
** 24 May – [[Battle of the Denmark Strait]] – ''Bismarck'' and ''Prinz Eugen'' sink HMS ''Hood''
** 24–27 May – [[Bismarck Chase|Hunt for the German battleship ''Bismarck'']] ends in her sinking
** 9 June [[Battle of the Litani River]] – Two Vichy French destroyers engage Australian amphibious forces, chased away by Allied ships
** 16 June-3 July [[Convoy HX 133]] – German U-boats attack Allied convoy, sinking six merchant ships.
** 18 June-12 July [[Convoy SL 78]] – Four German U-boats sink eight Allied merchant ships.
** 22 June-3 August [[Gulf of Riga campaign]] – Series of light engagements between German and Soviet ships, results in German control of the Gulf of Riga
** 22 June 1941 – 27 December 1942 [[Soviet Navy surface raids on Western Black Sea|Western Black Sea raids]] – Series of raids conducted by the Soviet Navy along Romanian and Bulgarian coasts, fails to disrupt Axis shipping
** 26 June [[Raid on Constanța]] – Soviet Black Sea Fleet attempts raid on Romanian port, attack is successfully repelled by Romanian destroyers
** 26 June [[Action of 26 June 1941]] – Romanian torpedo boats engage Soviet gunboats, damaging and capture one
** 9 July [[Action of 9 July 1941]] – Three Romanian torpedo boats engage and sink a Soviet submarine
** 13–14 July [[Operation München]] – Romanian monitor [[NMS Mihail Kogălniceanu|NMS ''Mihail Kogălniceanu'']] engages two Soviet monitors and forces their retreat
** 13–28 July [[Operation Substance]] – [[Force H]] is attacked by Italian torpedo boats, submarines, and aircraft en route to Malta
** 19 July-1 August [[Convoy OG 69]] – German and Italian submarines inflict heavy casualties on British convoy.
** 26 July [[Battle of Bengtskär]] – Soviet Naval Infantry attempt to capture the island of Bengtskär, landings are repelled by Finnish gunboats who sink a Soviet patrol boat
** 10–15 August [[Convoy HG 70]] – British convoy defends itself from German and Italian submarines with minimal losses.
** 13–25 August [[Convoy OG 71]] – 10 ships sunk in North Atlantic
** 25 August [[Anglo-Soviet invasion of Iran|Battle of Khuzestan]] – British and Australian sloops engage and sink Iranian sloops IIS ''Babr'' and IIS ''Palang''
** 27 August – [[HMS Graph|Capture of ''U-570'']] – British and Canadian destroyers capture German U-boat ''U-570''
** 27–31 August – [[Soviet evacuation of Tallinn]]
** 9–11 September [[Convoy SC 42]] – 14 ships and 2 U-boats sunk in North Atlantic
** 17 September – 1 October [[Convoy HG 73]] – 9 ships sunk in North Atlantic
** 27 September [[Operation Halberd]] – Royal Navy successfully defends convoy from Italian fleet and air attacks
** 14–18 October [[Convoy SC 48]] – 11 ships sunk in North Atlantic
** 22 October-5 November [[Convoy HX 156]] – Allied convoy successfully defends against U-boat attacks.
** 30 October – 4 July 1941 [[Siege of Sevastopol (1941–1942)|Siege of Sevastopol]] – Soviet Black Sea Fleet attempts to defend Sevastopol from Axis small craft and aircraft, ultimately fails
** 6 November – [[Crimean campaign]] – Romanian submarine [[NMS Delfinul|NMS ''Delfinul'']] sinks the Soviet cargo ship SS ''Uralets''
** 8–9 November [[Battle of the Duisburg Convoy]] – Royal Navy intercepts and destroys an Italian convoy
** 19 November – [[Sinking of HMAS Sydney|HMAS ''Sydney'' and the German surface raider ''Kormoran'']] destroy each other in a single ship action off Western Australia; ''Sydney'' is lost with all hands
** 6 December [[Action of 6 December 1941]] – Bulgarian submarine chasers, ''Chernomorets'' and ''Belomorets'' engage and sink the Soviet submarine ''Shch-204''
** 7 December '''[[Attack on Pearl Harbor|Pearl Harbor]]''', also starting the [[Pacific War]] – Japanese naval and air forces launch surprise raid on American naval base at Pearl Harbor, forces United States to enter World War II
** 8–23 December [[Battle of Wake Island]] – American coastal and air defenses at Wake Island hold off Japanese invasion for 15 days, sinking several Japanese warships in the process
** 8–25 December [[Battle of Hong Kong]] – British destroyers and gunboats are engaged by Japanese gunboats and aircraft
** 10 December South China Sea – [[HMS Prince of Wales (53)|HMS ''Prince of Wales'']] and [[HMS Repulse (1916)|HMS ''Repulse'']] [[Sinking of Prince of Wales and Repulse|sunk by Japanese air attack]]
** 13 December [[Battle of Cape Bon (1941)|Cape Bon]] – British and Dutch destroyers sink Italian cruisers
** 17 December [[First Battle of Sirte|First Sirte]] – Indecisive British-Italian fight off Libya
** 17 December [[Battle of Jibrieni]] – Soviets attack an Axis convoy, losing a submarine
** 19 December [[Raid on Alexandria (1941)|Raid on Alexandria]] – Italian frogmen cripple several British warships in Alexandria Harbor
** 19–23 December [[Convoy HG 76]] – 4 ships sunk and 5 U-boats destroyed
** 24–25 December [[Battle of Borneo (1941–1942)|Battle of Borneo]] – Dutch submarines engage several Japanese warships and transports during the opening days of the invasion
* 1942
** 12 January [[HNLMS Prins van Oranje|Action of 12 January 1942]] – Dutch minelayer, HNLMS ''Prins van Oranje'' is intercepted and sunk by the Japanese destroyer [[Japanese destroyer Yamakaze|''Yamakaze'']].
** 14 January [[Operation Postmaster]] – British commando unit aboard an armed trawler board and capture the three Axis merchant ships in the neutral Spanish Guinea port of Santa Isabel. 
** 23–25 January [[Battle of Balikpapan (1942)|Battle of Balikpapan]] – American and Dutch destroyers and submarines intercept and sink several Japanese transports
** 26–27 January [[Battle off Endau]] – Australian destroyer, [[HMAS Vampire (D68)|HMAS ''Vampire'']] is sunk by a Japanese fleet.
** 30 January-3 February [[Battle of Ambon]] – Japanese fleet lands invasion force on [[Ambon Island]]. Japanese minesweeper, ''W-9'' strikes a Dutch mine and is sunk, with two more Japanese minesweepers damaged. [[USS Heron (AM-10)|USS ''Heron'']] is severely damaged by Japanese aircraft, but survives.
** 30 January-15 February [[Convoy SC 67]] – Allied convoy defends itself against U-boat attacks. 
** 1 February [[Marshalls-Gilberts raids]] – American carriers launch airstrikes against Japanese bases
** 4 February [[Battle of Makassar Strait]] – Japanese aircraft launch attack on an American-Dutch fleet
** 11–13 [[Channel Dash]] – Major Kriegsmarine surface units escape from occupied-France to Germany, British attempt to intercept with disastrous results
** 13 February [[Battle of Palembang]] – British gunboat [[HMS Li Wo|HMS ''Li Wo'']] intercepts a Japanese convoy and engages it alone, she sinks a transport, but is later sunk by overwhelming fire from escort ships
** 16 February [[Attack on Aruba]] – Several German U-boats sink several Allied oil tankers in coordinated attack
** 16 February – 23 March [[Operation Neuland]] – German & Italian submarines carry out unrestricted submarine warfare in the Caribbean Sea.
** 18–20 February [[Battle of Badung Strait]] – Allied fleet engages Japanese fleet, losing a destroyer
** 19 February '''[[Bombing of Darwin]]''' – Japanese carrier task force attacks Australia
** 21–25 February [[Convoy ON 67]] – 8 ships sunk in North Atlantic
** 25–28 February [[Operation Abstention]] – British attempt to land on [[Kastelorizo]], but an Italian destroyer flotilla intercepts the landing fleet. British forced to retreat. 
** 27 February '''[[Battle of the Java Sea|Java Sea]]''' – Japanese invasion convoy escorts destroy ABDA fleet
** 27 February [[USS Langley (CV-1)|Sinking of the ''Langley'']] – Japanese aircraft attack Allied convoy centered around USS ''Langley'', she is severely damaged and forced to be scuttled.
** 28 February – 1 March [[Battle of Sunda Strait]] – Continuation of the Battle of the Java Sea, Japanese force sinks USS ''Houston'' and HMAS ''Perth''
** 1 March [[Second Battle of the Java Sea]] – Continuation of the Battle of the Java Sea, Japanese force sinks HMS ''Exeter'', HMS ''Encounter'', and USS ''Pope''
** 1 March [[USS Alden (DD-211)|Battle of the Bali Strait]] – Continuation of the Battle of the Java Sea, four surviving American destroyers skirmish with the Japanese, but escape to Australia
** 3 March [[USS Perch (SS-176)|Scuttling of USS ''Perch'']] – American submarine USS ''Perch'' is engaged by Japanese destroyers, suffers damaged and it scuttled, crew is later captured.
** 4 March [[HMAS Yarra (U77)|Last Stand of HMAS ''Yarra'']] – Australian sloop HMAS ''Yarra'' escorts a small convoy, but is intercepted by Japanese cruisers, engages them alone and is sunk.
** 6–13 March [[Operation Sportpalast]] – [[German battleship Tirpitz|German battleship ''Tirpitz'']] leads a fleet to intercept an Arctic convoy, but fails to locate it, British counter with aircraft, but also fail in finding the German fleet
** 22 March [[Second Battle of Sirte|Second Sirte]] – Italian fleet obstacles a British convoy to Malta, hit escorts, but failed to sink the cargo ships. Delay of the convoy led to the loss of four freighters by air attack
** 27 March [[Action of 27 March 1942]] – German submarine ''U-123'' sinks American Q-ship, USS ''Atik''.
** 28 March – [[St Nazaire Raid]] – British destroyer, [[HMS Campbelltown (I42)|HMS ''Campbelltown'']] crashes into Normandie dry dock, rending it useless for the rest of the war. 
** 28–29 March [[Convoy PQ 13]] – British cruiser HMS ''Trinidad'' and destroyers defend convoy against attacking German destroyers.
** 31 March – 1 April [[Battle of Christmas Island]] – Japan invades and occupies [[Christmas Island]], [[Japanese cruiser Naka|Japanese cruiser ''Naka'']] is severely damaged by American submarine, [[USS Seawolf (SS-197)|USS ''Seawolf'']]
** 31 March – 10 April '''[[Indian Ocean Raid]]''' – Japanese task force attacks Ceylon
**14 April [[Convoy OG 82]] – 1 U-boat sunk
** 19 April [[Bombardment of Curaçao]] – German U-boat [[German submarine U-130|''U-130'']] attempts to shell Dutch oil refinery on [[Curaçao]]. U-130 is engaged by Dutch shore batteries, but escapes.
** 3–4 May [[Invasion of Tulagi (May 1942)|Invasion of Tulagi]] – [[USS Yorktown (CV-5)|USS ''Yorktown'']] and her battlegroup engage the Japanese invasion fleet, sinking several small warships, but fail to prevent the capture of [[Tulagi]].
** 5 May-6 November [[Battle of Madagascar]] – Allied forces invade Vichy-controlled Madagascar. Allied fleet engages Vichy French and Japanese warships, before securing the island. 
** 6–21 May [[Convoy ON 92]] – German U-boats inflict heavy casualties upon Allied convoy.
** 8 May '''[[Battle of the Coral Sea|Coral Sea]]''' – Japanese invasion convoy turned back by US carrier aircraft. First carrier battle in history.
* 1942–44 German U-Boats campaign in [[Battle of the St. Lawrence|Gulf of St. Lawrence]]
** 22-27 May [[Action of 22 May 1942]] – [[Italian submarine Barbarigo|Italian submarine ''Barbarigo'']] sinks the Brazilian merchant ship, SS ''Comandante Lyra '', causing Brazilian Navy B-25's to give chase for five days, but eludes destruction.
** 31 May-8 June [[Attack on Sydney Harbour]] – Japanese submarines raid Sydney Harbour, and sink [[HMAS Kuttabul (ship)|HMAS ''Kuttabul'']]
** 3–4 June [[Battle of Dutch Harbor]] – Japanese carrier-based aircraft attack US Navy base in Dutch Harbor, Alaska. [[SS Northwestern|SS ''Northwestern'']] is sunk in the attack.
** 4–5 June '''[[Battle of Midway|Midway]]''' – invasion convoy retreats after US sinks four Japanese carriers and one Japanese heavy cruiser
** 6 June [[Action of 6 June 1942]] – [[German auxiliary cruiser Stier|German merchant raider ''Stier'']] sinks American Liberty Ship, SS ''Stanvac Calcutta.''
** 8 June [[Shelling of Newcastle]] – [[Japanese submarine I-21|Japanese submarine ''I-21'']] shells the Australian port of Newcastle, but do no damage. Australian coastal artillery engages, but ''I-21'' escapes.
** 12–15 June [[Operation Vigorous]] – 6 ships sunk from convoy to Malta. The rest of the convoy is driven back
** 14–15 June [[Operation Harpoon (1942)|Operation Harpoon]] – 6 ships sunk from convoy to Malta when the convoy is intercepted by an Italian cruiser squadron
** 14–17 June [[Convoy HG 84]] – German wolfpack attacks British convoy, sinking five merchant ships.
** 2–4 July [[Convoy PQ 17]] – 24 ships sunk from Arctic convoy to Soviet Union
** 5 July [[Action of 5 July 1942]] – American submarine [[USS Growler (SS-215)|USS ''Growler'']] sinks [[Japanese destroyer Arare (1937)|Japanese destroyer ''Arare'']]
** 5-8 July [[Convoy QS-15]] – German submarine ''U-132'' attacks an Allied convoy sinking three merchant ships.
** 8–10 July [[Battle of Someri]] – Finnish and German gunboats engage and sink Soviet gunboats in the Gulf of Finland
** 17–31 July [[Convoy ON 113]] – Wolfpack intercepts Allied convoy, sinking five merchant ships.
** 24 July-8 August [[Convoy ON 115]] – Wolfpack intercepts Allied convoy, sinks three merchant ships and loses one U-boat.
** 3 August [[Attack on the Dureenbee|Attack on the ''Dureenbee'']] – [[Japanese submarine I-175|Japanese submarine ''I-175'']] attacks and damages the Australian fishing trawler ''Dureenbee''
** 3 August [[Action of 3 August 1942]] – British submarine [[HMS Saracen (P247)|HMS ''Saracen'']] sinks German submarine [[German submarine U-335|''U-335'']] off the Faroe Islands.
** 5–10 August [[Convoy SC 94]] – 11 ships and 2 U-boats sunk in North Atlantic
** 8 August [[Battle of Savo Island|Savo Island]] – Japanese sink 4 cruisers escorting Guadalcanal invasion convoy
** 11–15 August [[Operation Pedestal]] – 13 ships sunk from convoy to Malta
** 16–30 August [[Operation Wunderland]] – German fleet successfully raids Soviet shipping in the Kara Sea, sinking several ships.
** 22–25 August [[Convoy ON 122]] – German U-boats inflict casualties on Allied convoy, demonstrated importance of radar. 
** 24 August '''[[Battle of the Eastern Solomons|Eastern Solomons]]''' – Japanese aircraft carrier ''Ryujo'' sunk while attacking Guadalcanal
** 27-28 August [[Convoys SG-6/LN-6]] – Two German submarines sink two Allied merchant ships.
** 2–21 September [[Operation Orator]] – Allies defend [[Convoy PQ 18]] from German attacks. Convoy losses 13 merchant ships, as to Germany's loss of four U-boats, majority of convoy makes it to Arkhangelsk. 
** 4 September – 2 November [[Battle of Bell Island]] – Two German submarines sink four Canadian ore ships off Newfoundland with heavy casualties. 
** 6-10 September [[Convoy QS-33]] – Two German submarines sink four Allied merchant ships and one Canadian armed yacht. 
** 10–14 September [[Convoy ON 127]] – 7 ships sunk in North Atlantic
** 12–16 September [[Convoy TAG 5]] – 2 ships sunk in Caribbean Sea
** 12-16 September [[Convoy SQ-36]] – Two German submarines sink three Allied merchant ships.
**12-24 September [[Laconia incident|''Laconia'' Incident]] – German U-boat [[German submarine U-156|''U-156'']] torpedoes and sinks British transport [[RMS Laconia (1921)|RMS ''Laconia'']]. Axis submarines and warships attempt to rescue survivors before being attacked by American aircraft, and forced to call off rescue efforts.
** 12–28 September [[Convoy SC 100]] – German U-boats attack Allied convoy, sinking five merchant ships.
** 13–14 September [[Operation Agreement]] – British forces attempt to land in [[Tobruk]], German and Italian torpedo boats and coastal defenses repel invasion, sinking several British warships.
** 13–26 September [[Convoy QP 14]] – German U-boats sink five allied ships of the convoy, while Allies sink one U-boat and damage five. 
** 27 September [[Action of 27 September 1942]] – [[German auxiliary cruiser Stier|German merchant raider ''Stier'']] engages American Liberty ship [[SS Stephen Hopkins|SS ''Stephen Hopkins'']]. Both ships sink each other in the engagement.  
** 1 October [[Battle of Cape Burnas]] – Romanian gunboats engage and sink Soviet submarine after it sank a German transport.
** 12 October [[Battle of Cape Esperance|Cape Esperance]] US cruisers intercept Japanese cruiser force approaching Guadalcanal
** 12–16 October [[Convoy SC 104]] – 8 ships and 2 U-boats sunk in North Atlantic
** 22 October [[Battle of Sukho Island]] – Germany attempts amphibious invasion of Sukho Island, but are repelled by Soviet gunboats, which sink several German transports.
** 26 October '''[[Battle of the Santa Cruz Islands|Santa Cruz Islands]]''' – USS ''Hornet'' sunk in aircraft carrier battle near Guadalcanal
** 26–29 October [[Convoy HX 212]] – 6 ships sunk in North Atlantic
** 27–31 October [[Convoy SL 125]] – 11 ships sunk decoying U-boats away from [[Operation Torch]]
** 1–4 November [[Convoy SC 107]] – 15 ships and 1 U-boat sunk in North Atlantic
** 2–8 November [[Convoy TAG 18]] – 6 ships sunk in Caribbean Sea
** 6–11 November [[Convoy TAG 19]] – 2 ships sunk in Caribbean Sea
** 8 November [[Naval Battle of Casablanca|Casablanca]] – French fleet in harbour an shore batteries attempt to defend Moroccan neutrality but are defeated by a US Navy fleet
** 11 November [[MV Ondina|Attack on the ''Ondina'']] – Dutch oil tanker MV ''Ondina'' and Indian corvette, [[HMIS Bengal (J243)|HMIS ''Bengal'']] defend themselves against two Japanese merchant raiders, sinking one of them.
** 12–15 November '''[[Naval Battle of Guadalcanal|Guadalcanal]]''' – decisive US victory, last offensive Japanese operation attempted in the Guadalcanal campaign, 11 transports and 2 battleships sunk. heavy losses on both sides in 2 night surface actions.
** 15–18 November [[Convoy ON 144]] – German U-boats inflict high casualties upon an Allied convoy.
** 30 November [[Battle of Tassafaronga|Tassafaronga]] US cruisers intercept Japanese destroyers resupplying Guadalcanal, but suffer heavy losses from torpedo attack
** 2 December [[Battle of Skerki Bank]] – Allied fleet intercepts Italian convoy and sinks all four transport ships and most of their escorting destroyers.
* December 1942-June 1943 [[Operation Lilliput]] – Royal Australian Navy provides escort to New Guinea convoys, defends them from Japanese air attacks
** 11–31 December [[Convoy ON 153]] – German U-boats intercept Allied convoy, sink three merchant ships.
** 26–30 December [[Convoy ON 154]] – 14 ships and 1 U-boat sunk in North Atlantic
** 30 December 1942 – 3 January 1943 [[Convoy JW 51B]] – British cruisers and destroyers defend convoy against attacking German cruiser-destroyer force. 
** 31 December [[Battle of the Barents Sea|Barents Sea]] – British escorts fight off German surface attack on convoy JW 51B
* 1943
** 3–12 January [[Convoy TM 1]] – 7 ships sunk in North Atlantic
** 14 January-18 February [[Operation Ke]] – Japan withdraws from the Solomon Islands, Allied and Japanese fleets conduct final engagements of the Guadalcanal Campaign.
**19-20 January [[Battle off Zuwarah]] – British destroyers sink Italian minesweeping force
** 23 January – 3 February [[SS Dorchester|Convoy SG-19]] – German submarine ''U-223'' sinks American troopship, SS ''Dorchester'' with a loss of 674 out of 904 of her crew. Greatest American loss of life from a single ship in a convoy. 
**28 January [[Shelling of Port Gregory]] – [[Japanese submarine I-165|Japanese submarine ''I-165'']] shells Australian port of Port Gregory, there are no casualties.
**29 January [[Battle of Rennell Island|Rennell Island]] – USS ''Chicago'' lost
** 4–7 February [[Convoy SC 118]] – 8 ships and 1 U-boat sunk in North Atlantic
** 21–25 February [[Convoy ON 166]] – 11 ships and 2 U-boats sunk in North Atlantic
** 2–4 March [[Battle of the Bismarck Sea|Bismarck Sea]] – aircraft sink 12 ships from a Japanese troop convoy to [[New Guinea]]
** 6 March [[Battle of Blackett Strait]] – an American task force intercepts 2 Japanese destroyers and sinks them both.
** 6–9 March [[Convoy SC 121]] – 7 ships sunk in North Atlantic
** 10–11 March [[Convoy HX 228]] – 5 ships and 2 U-boats sunk in North Atlantic
** 16–19 March [[Convoys HX 229/SC 122]] – 22 ships and 1 U-boat sunk in largest North Atlantic U-boat [[Wolfpack (naval tactic)|wolfpack]] attack
** 25 March-10 April [[Convoy HX 231]] – German U-boats attack Allied convoy, sink six merchant ships.
** 26 March [[Battle of the Komandorski Islands|Komandorski Islands]] – US cruiser force intercepts a Japanese [[Aleutian Islands]] convoy
** 28 March [[Convoy RS 3]] – German U-boats destroy Convoy RS 3. 
** 1–16 April [[Operation I-Go]] – Japanese launch ariel counteroffensive against Allies in the Solomon Islands, sinking a small number of ships.
** 16 April [[Battle of the Cigno Convoy]] – Italian destroyers defend transport against attacking pair of British destroyers
** 30 April-1 May [[Convoy TS 37]] – ''U-515'' attacks a convoy alone and sinks seven Allied merchant ships.
** 3–4 May [[Battle of the Campobasso Convoy]] – British destroyers sink Italian transport and destroyer
** 9–13 May [[Convoy HX 237]] – German U-boats attack Allied convoy, sinking three merchant ships. Allies counter and sink three U-boats.
** 11–13 May [[Convoy SC 129]] – British defend against large U-boat attack, sinking three U-boats and minimal losses to convoy. 
** 14 May [[AHS Centaur|Attack on AHS ''Centaur'']] – [[Japanese submarine I-177|Japanese submarine ''I-177'']] sinks Australian hospital ship AHS ''Centaur'' with a heavy loss of life.
** 15 May [[German submarine U-176|Sinking of U-176]] – Cuban submarine chasers sink ''U-176'' in the Caribbean. 
** 18–20 May [[Convoy SC 130]] – 3 U-boats sunk in North Atlantic
** 29 April – 6 May [[Convoy ONS 5]] – 12 ships and 6 U-boats sunk in last major North Atlantic U-boat [[Wolfpack (naval tactic)|wolfpack]] attack
** 15–20 June [[Convoy GP55]] – Japanese submarine [[Japanese submarine I-174|''I-174'']] intercepts Allied convoy and sinks American transport and damages an LST.
** 6 July [[Battle of Kula Gulf|Kula Gulf]]
** 8–12 July [[Convoy Faith]] – German aircraft attack Allied convoy, sinking two Allied troopships with heavy casualties. 
** 10-12 July [[Battle of Gela (1943)|Battle of Gela]] - Allied Fleet engages Italian coastal batteries during the [[Allied Invasion of Sicily]].
** 12–13 July [[Battle of Kolombangara]] – Japan defeats a US and New Zealand fleet
** 17–18 July [[Operation Scylla]] – Italian cruiser [[Italian cruiser Scipione Africano|''Scipione Africano'']] repels attack by British torpedo boats, sinking one.
* 31 July [[Action of 31 July 1943]] – [[German submarine U-199|German submarine ''U-199'']] is attacked and sunk by US & Brazilian naval aircraft off Rio de Janeiro.
* August 1943-October 1944 [[Kara Sea U-boat campaign]] – German U-boats attempt to disrupt Soviet shipping in the Kara Sea, scoring several kills
** 6–7 August [[Battle of Vella Gulf]] – American destroyers intercept the "[[Tokyo Express]]" and sink 3 Japanese destroyers.
** 17–18 August [[Battle off Horaniu]] – American destroyers intercept Japanese convoy evacuation the Solomon Islands
** 29 August [[Battle of Isefjord]] – Danish coastal defense ship, [[HDMS Niels Juel (1918)|HDMS ''Niels Juel'']] is sunk by German  warships and aircraft while attempting to flee to Sweden.
** 8 September [[Operation Zitronella]] – German task force led by ''Tirpitz'' and ''Scharnhorst'' destroy Norwegian coastal defenses in Svalbard
** 8 September-22 November [[Dodecanese campaign]] – German forces invade and occupy the Italian Dodecanese Islands, Allied and Italian fleets take heavy losses.
** 9 September [[Action off Bastia]] – Italian destroyers and coastal defenses engage a small German auxiliary fleet, sinking all of them. 
** 9 September [[Battle of the Straits of Bonifacio]] – Main Italian fleet attempts to sail to Sardinia following Armistice. German aircraft intercept Italian fleet. [[Italian battleship Roma (1940)|Italian battleship ''Roma'']] is sunk by German aircraft with a [[Fritz X]] radio-controlled bomb. 
** 19–23 September [[Convoys ONS 18/ON 202]] – German U-boats simultaneously attack two convoys, but Allies defend them with minimal losses. 
** 28 September-12 October [[Convoy SC 143]] – German U-boats attack Allied convoy, Allied fleet successfully defends it, sinking three U-boats.
** 6 October – [[Naval Battle of Vella Lavella]]
** 15–18 October [[Convoys ONS 20/ON 206]] – Allied convoys defend themselves against large U-boat attack, with only a single ship lost.
** 22–23 October [[Battle of Sept-Îles]] – German light force defeats similar British force
** 26–29 October Convoy ON 207 – 3 U-boats sunk by a combination of air and naval support in the North Atlantic
** 27–31 October [[Convoy SL 138/MKS 28]] – 1 ship and 1 U-boat destroyed in North Atlantic
** 2 November [[Battle of Empress Augusta Bay|Empress Augusta Bay]]
** 6 November [[Action off Cape Bougaroun]] – German aircraft attack Allied convoy off Algeria, sinking several ships.
** 13 November [[Action of 13 November 1943]] – British submarine [[HMS Taurus (P339)|HMS ''Taurus'']] sinks Japanese submarine ''I-34''
** 18–21 November [[Convoy SL 139/MKS 30]] – 1 ship and 3 U-boats sunk
** 24 November-5 December [[Convoy SL 140/MKS 31]] – Allied convoy defends against attacking U-boats, sinking six of them.
** 26 November [[Battle of Cape St. George]] – American destroyers intercept the "Tokyo Express" and sink 3 Japanese destroyers.
** 13 December [[Action off Silba]] – Three British torpedo boats attack the grounded Croatian cruiser ''Zniam'' and permanently disabling her and sinking a tug.
** 20–30 December [[Convoy JW 55B]] – German battleship ''Scharnhorst'' and escorts sortie to locate Allied convoy. Preludes Battle of the North Cape. 
** 26 December [[Battle of North Cape|North Cape]] – convoy JW 55B escorts sink ''Scharnhorst'' off northern [[Norway]]
** 28 December [[Operation Stonewall]] – Allied ships and aircraft sink three German destroyers in the [[Bay of Biscay]]
* 1944
** 11 January [[Action of 11 January 1944]] – British submarine HMS ''Tally-Ho'' sinks Japanese light cruiser ''Kuma'' off Penang 
** 12-27 January [[Convoy JW 56A]] – German U-boats sink and damage half of the convoy. 
** 14 February [[Action of 14 February 1944]] – British submarine HMS ''Tally-Ho'' sinks German submarine ''UIT-23'' off Penang 
** 17 February [[Operation Hailstone]] – Allied fleet attacks former Japanese naval stronghold at Truk Lagoon in the central Pacific, Japanese defenders lose many aircraft and merchant ships
** 29 February [[Battle of Ist]] – Free French destroyers intercept German convoy and sink a corvette and freighter 
** 1–16 March [[Indian Ocean raid (1944)|Second Indian Ocean Raid]] – Japanese heavy cruiser ''Tone'' sinks British freighter ''Behar''. The crew of ''Behar'' are later executed aboard ''Tone''.
** 29 March [[Action of 29 March 1944]] – Colombian destroyer ARC ''Caldas'' defends convoy against German submarine ''U-154'', and damages her. 
** 19 April – [[Action of 19 April 1944]] – Norwegian submarine [[HNoMS Ula (1943)|HNoMS ''Ula'']] attacks sinks the [[German submarine U-974|German submarine ''U-974'']].
** 22 April-31 May [[Convoy UGS-40]] – German aircraft attack Allied convoy in Mediterranean, but fail to score a single hit. Allies suffer no losses, while Germany loses 19 aircraft.  
** 26 April [[Action of 26 April 1944]] – British light cruiser HMS ''Black Prince'' and escorting destroyers intercept a flotilla of German destroyers, sinking one of them.
** 28 April [[Exercise Tiger|Battle of Lyme Bay]] – German E-boat's raid Lyme Bay and sink two American tank landing ships. 
** 6 May [[Action of 6 May 1944]] – German submarine ''U-66'' is sunk by aircraft from {{USS|Block Island|CVE-21}} and rammed by {{USS|Buckley|DE-51}}
** 13 May [[Action of 13 May 1944]] – Japanese submarine ''RO-501'' is sunk by American destroyer escorts off the Azores.
** 4 June [[German submarine U-505|Capture of ''U-505'']] – German submarine ''U-505'' is captured by {{USS|Guadalcanal|CVE-60}} and her destroyer escorts off Cape Verde.
** 6 June '''[[Invasion of Normandy]]''' – Allied fleets launch the largest amphibious invasion ever conducted in Occupied-France. Allied warships do battle against German coastal defenses and torpedo boats, losing several warships in the invasion.
** 6 June [[German submarine U-744|Capture of ''U-744'']] – British and Canadian warships capture and later scuttle the German submarine ''U-744''
** 9 June [[Battle of Ushant (1944)|Battle of Ushant]] – Allied 10th destroyer flotilla (UK/Canadian/Polish ships) engage and defeat remnants of the German 8th destroyer flotilla off Brittany
** 19 June '''[[Battle of the Philippine Sea|Philippine Sea]]''' – US invasion of Saipan initiates the largest aircraft carrier battle in history including "The Great Marianas Turkey Shoot"
** 19–20 June [[Battle of Nerva Island]] – Soviet gunboats and torpedo boats repel attack by two German destroyer escorts, ''T-30'' and ''T-31''. ''T-31'' is sunk.
** 24 June [[Action off Murter Island]] – Two British torpedo boats engage German and Croatian torpedo boats off Murter Island. Croatian torpedo boat ''T7'' is damaged and beached. 
** 17 July [[Action of 17 July 1944]] – British submarine HMS ''Telemachus'' sinks Japanese submarine ''I-166'' off Penang
** 17 July [[Operation Mascot]] – Royal Navy launches carrier assault against German battleship ''Tirpitz'', but fails.
** 17 July-3 August [[Convoy HX 300]] – Largest convoy of the war, despite German U-boat attacks, Allies successfully defend merchant ships with no losses. 
** 15 August [[Battle of Port Cros]] – American destroyer {{USS|Somers|DD-381}} sinks a German aviso and corvette
** 15 August-14 September [[Operation Dragoon]] – Combined Allied fleet launches amphibious assault in Southern France. Allied warships exchange fire against German coastal artillery.
** 18–19 August [[Convoy Hi-71]] – American submarines sink Japanese convoy and escort carrier ''Taiyo''
** 7 September [[Shin'yo Maru incident|''Shin'yo Maru'' Incident]] – American submarine USS ''Paddle'' attacks Japanese convoy and sinks cargo ship ''Shin'yo Maru'' killing several American POW's
** 23–26 October '''[[Battle of Leyte Gulf|Leyte Gulf]]''' – US invasion of the Philippines produces a decisive battle with the Japanese fleet including four main actions – the [[Sibuyan Sea]], [[Surigao Straits]], off [[Samar (island)|Samar]] and [[Cape Engaño (Luzon)|Cape Engano]]. First use of Kamikaze tactics by the Japanese.
** 6 October [[Action of 6 October 1944]] – Dutch submarine HNLMS ''Zwaardvisch'' sinks German submarine ''U-168'' in the Java Sea
** 12–16 October [[Formosa Air Battle]] – American carrier-based aircraft and Japanese naval aircraft do battle over Formosa
** 23 October [[Battle of Maun Island]] – Yugoslav Partisan Navy gunboats engage two German submarine chasers in a minor skirmish. Yugoslav Partisans retreat after taking damage. 
** 1 November [[Action of 1 November 1944|Battle of Pag Island]] – Two British destroyers ambush and sink a German destroyer and two corvettes
** 9 November-21 December [[Battle of Ormoc Bay]] – American destroyers attack sink several Japanese destroyers and merchant ships
** 10 November [[Action of 10 November 1944]] – American submarine USS ''Flounder'' sinks German submarine ''U-537'' in the Java Sea
** 15–18 November [[Convoy Hi-81]] – American submarines intercept Japanese convoy and sink escort carriers ''Shinyo'' and ''Akitsu Maru''
** 24 December [[SS Léopoldville (1928)|Convoy WEP 3]] – Belgian troopship SS ''Leopoldville'' is torpedoed and sunk by German submarine ''U-486'' with a loss of 819 lives.
* 1945
** 10–20 January [[South China Sea raid]] – American fleet successfully disrupts Japanese shipping in the South China Sea
** 14 March [[German submarine U-174|Sinking of ''U-174'']] – South African frigate [[HMSAS Natal|HMSAS ''Natal'']] sinks ''U-174'' on her maiden voyage.
** 18 March [[Battle of the Ligurian Sea]] – Two British destroyers sink two German destroyer escorts
** 19 March [[Attack on Kure (March 1945)|First Bombing of Kure]] – American carrier-based aircraft damage Japanese warships at anchor in Kure
** 1 April – 25 May '''[[Battle of Okinawa]]''' – The Japanese lose their last significant naval force, including the battleship [[Japanese battleship Yamato|''Yamato'']]. Large scale systematic Kamikaze operations conducted by Japanese air forces.
** 6 April-22 June [[Operation Kikusui]] – Japanese ''Kamikaze'' campaign against Allied warships begins
** 12 April [[German submarine U-1024|Capture of ''U-1024'']] – Two British frigates capture German submarine ''U-1024'' in the Irish Sea
** 12 April-7 May [[Operation Teardrop]] – Allied anti-submarine warfare campaign along the North American East coast.
** 16 April [[Action of 16 April 1945]] – [[Italian Social Republic]] [[MT explosive boat]] hits the [[French destroyer Trombe|French destroyer ''Trombe'']] off [[Liguria]], Italy. She survives, but is damaged beyond repair. 
** 23 April [[Action of 23 April 1945]] – German submarine ''U-183'' is sunk by American submarine USS ''Besugo'' in the Java Sea
** 5–6 May [[Battle of Point Judith]] – American destroyers sink German submarine ''U-853'' in the Long Island Sound.
** 7-8 May [[Actions of 7-8 May 1945]] – Three German U-boats attack and sink three Allied ships. ''U-320'' is sunk in the action, becoming the last U-boat to sunk. Final German naval action of the war. 
** 15–16 May [[Battle of the Malacca Strait]] – British 26th Destroyer Flotilla ambush and sink the Japanese heavy cruiser ''Haguro''.
** 8 June [[Action of 8 June 1945]] – Two British submarines intercept and sink Japanese heavy cruiser ''Ashigara''.
** 18 July [[Attack on Yokosuka]] – Allied naval aircraft bomb and damage Japanese warships in Yokosuka
** 22–23 July [[Battle of Sagami Bay]] – American destroyers intercept Japanese convoy fleeing Tokyo Bay, last surface battle of the war.
** 24 July [[Action of 24 July 1945]] – American destroyer escort USS ''Underhill'' is sunk by Japanese ''kaiten'' (suicide-torpedoes)
** 24–28 July [[Attacks on Kure and the Inland Sea (July 1945)|Second Bombing of Kure]] – Allied naval aircraft sink all remaining Japanese capital ships in Kure
** July–August [[Allied naval bombardments of Japan during World War II|Allied naval bombardments of Japan]] – Allied warships bombard strategic sites on the Japanese coast

===Later 20th century===

*1946
**[[Corfu Channel incident]] – British naval vessels are attacked by Albanian artillery fortifications. This would cause British and Albanian relations to be severed until the end of the Cold War.
*1947
** [[1947 Paraguayan Civil War]] – Paraguayan gunboats ''[[ARP Humaitá|Humaitá]]'' and ''[[ARP Paraguay|Paraguay]]'' revolt against President [[Higinio Morínigo]] and are engaged by loyalist forces. ''Humaitá'' is disabled by loyalist aircraft. Both ships are later recaptured by loyalist warships.
* 1948
** 21 June 1948 [[Altalena Affair]] – Israeli Defense Forces shell and disable the [[Irgun]] LST ''Altalena'' to prevent it from delivering its cargo of weapons.
** October 1948 – [[Israeli naval campaign in Operation Yoav]]
*** 19 October 1948 – Battle near Majdal – Israeli corvettes and submarine chaser engage an Egyptian corvette and aircraft.
*** 22 October 1948 – Sinking of the ''Emir Farouk'' – Israeli patrol ship and explosive boats intercept and sink the Egyptian flagship, [[Egyptian sloop El Amir Farouq|''Emir Farouk'']] off Gaza.
* 1949
** 20 April-30 July – [[Amethyst Incident]] – British warships come under fire by Communist Chinese coastal artillery, forcing more Royal Navy ships to come to their rescue.
* 1950
** 25–26 June 1950 – [[Battle of Korea Strait]] – South Korean submarine chaser engages and sinks North Korean steamer.
** 2 July – [[Battle of Chumonchin Chan]] – US and British cruisers intercept [[Korean People's Navy]] convoy during the [[Korean War]]
** 10 September 1950 – [[Battle of Haeju]] – South Korean patrol ship sinks a North Korean minelayer.
** 10–19 September [[Battle of Incheon]] – [[United Nations Command|UN Command]] amphibious invasion in support of [[South Korea]]
* 1951
** 29 June – [[Manhattan Rebellion]] – Royal Thai Navy flagship, [[HTMS Sri Ayudhya|HTMS ''Sri Ayudhya'']] is sunk by coastal guns and air strikes during a failed coup.
** 28–30 September 1951 – [[Naval Battle of the Han River (1951)|Battle of the Han River]] – Australian frigate [[HMAS Murchison (K442)|HMAS ''Murchison'']] destroys Chinese coastal batteries.
*1953
** [[Dongshan Island Campaign]] – Taiwanese fleet and amphibious forces attempt to retake Dongshan Island from China. Operation fails with a loss of three tank landing ships.
* 1954
** Dongji Islands Campaign<ref>{{Cite web |title=Chinese Naval Battles(Civil War and later)(re-done) |url=http://www.soviet-empire.com/ussr/viewtopic.php?f=149&t=50411&p=911200&sid=2fe565f5d7597864734616a37e999866 |url-status=dead |archive-url=https://web.archive.org/web/20160729214838/http://www.soviet-empire.com/ussr/viewtopic.php?f=149&t=50411&p=911200&sid=2fe565f5d7597864734616a37e999866 |archive-date=29 July 2016 |website=Soviet-Empire.com}}</ref>
*** 15 May – Two Chinese gunboats engage a Taiwanese fleet, damaging a destroyer escort.
*** 16 May – Chinese fleet engages Taiwanese destroyer escort [[USS Thomas|ROCS ''Tai Ho'']] and damagers her, forcing her to retreat.
** [[First Taiwan Strait Crisis]]
*** 14 November – Sinking of ROCS ''Tai Ping'' – Taiwanese destroyer escort [[USS Decker|ROCS ''Tai Ping'']] is sunk by four Chinese torpedo boats off the Dachen Islands.
* 1955
** 19 September – Bombardment of [[Mar del Plata]] – Rebelling Argentine fleet bombards loyalist army positions during the [[Revolución Libertadora]].
* 1956
** 29 October – 7 November 1956 – [[Suez Crisis]]
*** 30 October 1956 – Battle off Haifa – Israeli and French destroyers engage and capture the Egyptian destroyer escort [[HMS Mendip (L60)|ENS ''Ibrahim el-Awal'']].
*** 31 October 1956 – Sinking of the ''Domiat'' – British light cruiser [[HMS Newfoundland (59)|HMS ''Newfoundland'']] and destroyer [[HMS Diana (D126)|HMS ''Diana'']] engage and sink the Egyptian frigate [[HMS Nith (K215)|ENS ''Domiat'']].
* 1958
** 23 August-2 December [[Second Taiwan Strait Crisis]]
*** 24 August – First Battle of Jinmen Island – Chinese torpedo boats attack a Taiwanese convoy off Jinmen Island, sinking a transport and damaging a landing ship.
*** 2 September – Second Battle of Jinmen Island – Chinese torpedo boats, again, attack a Taiwanese convoy off Jinmen Island, losing two torpedo boats and damaging a submarine chaser.
*** 24 September – [[Dongding Island|Battle of Dongding Island]] – Chinese gunboats and landing craft attempt to land on Dongding Island, but are repelled by Taiwanese warships. One Taiwanese landing ship is sunk, while another is damaged.
* 1961
** 28 March-8 June – [[Vlora incident]] – Albanian forces seize control of [[Pasha Liman Base]], capturing many Soviet warships and destroying one. 
** 17–19 December 1961 – [[Annexation of Goa]]
*** 18 December 1961 – Battle of Mormugao Harbor – Indian frigates [[INS Betwa (F139)|INS ''Betwa'']] and [[INS Beas (F137)|INS ''Beas'']] engage and sink the Portuguese sloop [[NRP Afonso de Albuquerque|NRP ''Afonso de Albuquerque'']].
*** 18 December 1961 – Naval Action at Daman – Portuguese patrol boat NRP ''Antares'' escapes Indian air strikes.
*** 18 December 1961 – Naval Action at Diu – Indian light cruiser, [[INS Delhi (C74)|INS ''Delhi'']] sinks Portuguese patrol boat NRP ''Vega''.
* 1962
** 15 January – [[Battle of Arafura Sea]] – Three Indonesian fast attack craft engage three Dutch destroyers off New Guinea, but attack is successfully repelled.
** 2-6 June – [[El Porteñazo]] – Rebellion Venezuelan warships exchange fire on a loyalist positions.
* 1964
** 2 August [[Gulf of Tonkin Incident]] – encounter between the {{USS|Maddox|DD-731|6}} and three [[Vietnam People's Navy]] torpedo boats near [[North Vietnam]]. Lead to the [[Gulf of Tonkin Resolution]] and the escalation of the [[Vietnam War]], although the incident was later found to be misrepresented by the U.S. government.
** 6 August [[Battle of Tillyria]] – Two Cypriot patrol ships engage Turkish Cypriot militia, before being sunk by Turkish fighter jets.
* 1965
**[[Vũng Rô Bay incident]] – South Vietnam navy intercepted and destroyed North Vietnam trawlers from the north try to invasion South Vietnam's water to support [[Viet Cong]] escalating the war.
** [[Project National Glory]]
*** 1 May – [[Battle of Dong-Yin]] – Taiwanese submarine chaser ROCS ''Dong Jiang'' repels an attack by eight Chinese gunboats, sinking four of them and damaging two.
*** 6 August – [[Battle of Dongshan]] – Taiwanese submarine chaser ROCS ''Zhang Jiang'' and patrol ship ROCS ''Jiang Men'' are sunk by Chinese torpedo boats.
*** 13–14 November – [[Battle of East Chongwu]] – Chinese patrol ships and torpedo boats engage Taiwanese patrol ships ROCS ''Lin Huai'' and ROCS ''Shan Hai''. ''Lin Huai'' is forced to run aground due to damage sustained in battle, while ''Shan Hai'' escapes.
** [[Operation Dwarka]] – [[Pakistan Navy]] engagement in [[Dwarka]] during the [[Indo-Pakistani War of 1965|Second Indo-Pakistani War]]
* 1967
** 8 June – [[USS Liberty incident|USS ''Liberty'' incident]] – [[Israeli Navy]] pioneers anti-ship use of [[napalm]] to disable American [[technical research ship]] during the [[Six-Day War]]<ref>''Assault on the ''Liberty'': The True Story of the Israeli Attack on an American Intelligence Ship''], by James M. Ennes, Jr. ({{ISBN|0-9723116-0-2}}) page 67</ref>
** 11 July – [[Battle of Rumani Coast]] – Israeli destroyer [[HMS Zealous (R39)|''INS Eilat'']] and two torpedo boats sink two Egyptian torpedo boats.
** 21 October – [[Egyptian Navy]] [[Komar-class missile boat]]s sink Israeli destroyer [[HMS Zealous (R39)|''INS Eilat'']] in the first combat use of [[P-15 Termit]] surface to surface missiles
* 1968
** 23 January – North Korean Navy captures United States Navy [[technical research ship]] [[USS Pueblo (AGER-2)|''Pueblo'']]
** 1 March 1968 – [[Action of 1 March 1968]] – US Coast Guard and South Vietnamese warships engage and sink four North Vietnamese naval trawlers.
* 1970
** 16 May – Sinking of the ENS ''El Qaher'' – Israeli aircraft sink the Egyptian destroyer [[HMS Myngs (R06)|ENS ''El Qaher'']] during the [[War of Attrition]].
* 1971
** [[Operation Trident (Indo-Pakistani War)]]
** [[Operation Python]] (Indo-Pakistan War)
** [[PNS Hangor#Indo-Pakistan War of 1971|Sinking of INS Khukri]]
* 1972
** April – [[First Battle of Quang Tri]]—US cruiser-destroyer forces heavily and directly engaged in tank and artillery duals at and below [[Vietnamese Demilitarized Zone|DMZ]] and in defense of Dong Ha Bridge
** 19 April – [[Battle of Đồng Hới]] – United States cruiser-destroyer force engages North Vietnamese forces
** 9 May – [[Operation Linebacker|Operation Pocket Money]] – United States Navy mines [[Hai Phong]] harbor
** 10 May – [[Operation Custom Tailor]] – United States Navy attacks [[Hai Phong]]
* 1973
** 7 October – [[Battle of Latakia]] – Israelis defeat [[Syrian Navy]] during the [[Yom Kippur War]]
** 7 October – [[Battle of Marsa Talamat]] – Israeli patrol boats sink Egyptian patrol boat
** 8–9 October – [[Battle of Baltim]] – Israelis defeat Egyptians
** 11 October – [[Second Battle of Latakia]] – Israelis try to sink more Missile Boats and destroy onshore Oil Tanks, but only got probable results
* 1974
** 19 January [[Battle of the Paracel Islands]] – [[People's Liberation Army Navy]] defeats [[Republic of Vietnam Navy]] at [[Paracels Islands]].
** 20-22 July [[Battle of Pentemili beachhead]] – Turkish amphibious assault during the [[Turkish Invasion of Cyprus]]. Two Cypriot torpedo boats are sunk trying to intercept the landing force. 
* 1975
** April 1975 – [[East Sea Campaign]] – Series of clashes between North Vietnamese and South Vietnamese warships that ultimately led to the North Vietnamese capture of the Spratly Islands.
** 12–15 May 1975 – [[Mayaguez Incident]] – Khmer Rouge capture American cargo ship [[SS Mayaguez|SS ''Mayaguez'']] off Koh Tang, Cambodia. Frigate [[USS Harold E. Holt|USS ''Harold E. Holt'']] later rescues crew.
* 1977
** 4 March – Ethiopian patrol ship ''P-11'' is sunk by naval forces of the [[Eritrean People's Liberation Front]].<ref>https://www.wrecksite.eu/wreck.aspx?306179 {{Bare URL inline|date=August 2024}}</ref>
* 1980
** 10 May – Sinking of the HMBS ''Flamingo'' – Bahamas patrol ship HMBS ''Flamingo'' was sunk by two Cuban MIG-21's.
** [[Operation Morvarid]] – [[Iranian navy]] decisively defeats [[Iraqi navy]] (Destruction of 80% of the Iraqi Navy) during the [[Iran–Iraq War|Iran-Iraq War]].
* 1981
** 6 February – [[Attacks on shipping in Lough Foyle (1981–82)|Sinking of the coaster ship ''Nellie M'']] – An IRA [[active service unit]] hijacked a lifeboat at [[Moville]], [[Republic of Ireland]]. boarded the small cargo ship and sank it with  an explosive charge.
*1982
**23 February – [[Attacks on shipping in Lough Foyle (1981–82)|Sinking of the coaster ship ''St. Bedan'']] – An IRA [[active service unit]] hijacked a lifeboat at [[Moville]], [[Republic of Ireland]]. boarded the small cargo ship and sank it with  an explosive charge.
**25 April – [[Operation Paraquet]] – Royal Navy helicopters cripple Argentine submarine [[ARA Santa Fe (S-21)|ARA ''Santa Fe'']] while attempting to reinforce troops on [[South Georgia (island)|South Georgia]] in the early phases of the [[Falklands War]].
**30 April – Attack on the ARA ''Alferez Sobral'' – Two Royal Navy helicopters engage Argentine patrol ship [[ARA Alferez Sobral (A-9)|ARA ''Alferez Sobral'']].
**2 May – Sinking of the ARA ''General Belgrano'' – British submarine [[HMS Conqueror (S48)|HMS ''Conqueror'']] torpedoes and sinks Argentine light cruiser [[ARA General Belgrano (C-4)|ARA ''General Belgrano'']] .
**4 May – Sinking of HMS ''Sheffield'' – Argentine fighter jets sink the British destroyer [[HMS Sheffield (D80)|HMS ''Sheffield'']] with an Exocet missile.
**21–25 May – [[Battle of San Carlos (1982)|Battle of San Carlos]] – A battle between aircraft and ships when British forces landed on the shores of [[San Carlos Water]] during the [[Falklands War]]. British destroyer [[HMS Coventry (D118)|HMS ''Coventry'']] and British frigates [[HMS Ardent (F184)|HMS ''Ardent'']] and [[HMS Antelope (F170)|HMS ''Antelope'']] are all sunk by bombs from Argentine light attack aircraft.
**23 May – [[Battle of Seal Cove]] – A minor naval clash, it involves the attempt by two Royal Navy frigates to seize an [[Argentine Navy]] coaster. The coaster evaded capture by running aground.
**25 May – Sinking of SS ''Atlantic Conveyor'' – British cargo ship [[SS Atlantic Conveyor|SS ''Atlantic Conveyor'']] is sunk by two Argentine Exocet missiles fired from fighter jets.
**8 June – Attack on the RFA ''Sir Galahad'' and RFA ''Sir Tristam'' – British logistics ship [[RFA Sir Galahad (1966)|RFA ''Sir Galahad'']] is hit by three Argentine aerial bombs that destroyed the vessel. The hulk would later be scuttled via torpedoes by [[HMS Onyx (S21)|HMS ''Onyx'']] on 21 June. The same-class vessel [[RFA Sir Tristram|RFA ''Sir Tristam'']] was seriously damaged but eventually returned to service after undergoing major repairs. 
**11–12 June – [[Battle of Two Sisters]] – British destroyer [[HMS Glamorgan (D19)|HMS ''Glamorgan'']] is struck and damgaged by an Exocet missile fired from an Argentine land-base launcher while providing naval gunfire support to Royal Marines.
**16 June – The [[coastal trading vessel|coaster]] ''Transit'' sank in the [[Mediterranean Sea]] {{convert|8|nmi|km}} off [[Tripoli, Lebanon]] after being torpedoed by an unnamed Israeli submarine.<ref>[https://www.timesofisrael.com/israel-admits-it-sank-lebanese-refugee-boat-in-1982-war-error-killing-25-tv/ ''Israel admits it sank Lebanese refugee boat in 1982 war error, killing 25 — TV.''] The Times of Israel, 22 November 2018.</ref> She was carrying 56 refugees to [[Larnaca]], [[Cyprus]], 25 of whom were killed.<ref name=Transit>{{cite web |url=http://www.marhisdata.nl/main.php?to_page=schip&id=2654 |title=HARINGVLIET |publisher=Stichting Maritiem Historische Databank |accessdate=13 October 2014}}</ref>
**11 September – Sinking of ''Milanian'' and ''Kahnamoie'' – Iraqi fighters armed with Exocet missiles sink two Iranian [[Bayandor-class corvette|''Bayandor''-class corvettes]], IRIS ''Milanian'' and IRIS ''Kahnamoie''.<ref>{{Cite web |title=Iraq reports sinking Iranian navy ship - UPI Archives |url=https://www.upi.com/Archives/1982/09/11/Iraq-reports-sinking-Iranian-navy-ship/1510400564800/ |access-date=2024-02-19 |website=UPI |language=en}}</ref>
* 1983
** [[SS Raffaello|Sinking of the ''Raffaello'']] – Iraqi Exocet missile sinks the ocean liner-turned-barracks ship, SS ''Raffaello'' while in port in [[Bushehr]].
* 1986
** [[Action in the Gulf of Sidra (1986)]] – US Navy engages [[Libyan Navy]] in a fleet action.
* 1987
** 17 May – [[USS Stark incident|USS ''Stark'' incident]] – US frigate, [[USS Stark (FFG-31)|USS ''Stark'']] is struck by two Exocet missiles fired from an Iraqi fighter jet, severely damaging it.
** 21 September – [[Operation Prime Chance]] – US Navy SEALs board and capture and later scuttle the Iranian minelayer ''[[Iran Ajr]]''.
** 16 October – [[MV Sea Isle City|Attack on the MV ''Sea Isle City'']] – Iranian forces attack the Kuwaiti oil tanker MV ''Sea Isle City'', wounding 18 of her crew, including her American captain.
** 19 October – [[Operation Nimble Archer]] – US fleet destroys two Iranian oil platforms in retaliation for attacking the Kuwaiti tanker ''Sea Isle City''
* 1988
** 14 March – [[Johnson South Reef Skirmish]] – Chinese frigates engage and sink three Vietnamese transports.
** 18 April [[Operation Praying Mantis]] – In the largest US naval engagement since World War II, the U.S. Navy defeats [[Islamic Republic of Iran Navy]] forces in retaliation for the mining of the [[USS Samuel B. Roberts (FFG-58)|USS ''Samuel B. Roberts'']] during a patrol mission.
* 1990
** February – [[Dahlak Archipelago|Dahlak Islands Campaign]] – Ethiopian [[Petya-class frigate|''Petya''-class frigate]], ''F-1616'', is damaged beyond repair by [[Eritrean People's Liberation Front]] forces and later scuttled.<ref>{{Cite web |title=ZERAI DERES light frigates (1968-1969/1983-1984) |url=https://www.navypedia.org/ships/ethiopia/eth_es_zerai_deres.htm |access-date=2024-02-19 |website=www.navypedia.org}}</ref>
** 2 August – [[Iraqi invasion of Kuwait]] – Most of the [[Kuwait Naval Force]] was destroyed by Iraqi air and naval forces, with surviving ships escaping to Bahrain.
** 6 September – [[RFA Fort Victoria bombing|RFA ''Fort Victoria'' bombing]] – The British auxiliary ship was bombed and heavily damaged by the IRA while at dock at [[Harland & Wolff]] shipyard. 
* 1991
** 18–19 January – [[Battle of Ad-Dawrah]] – US frigate [[USS Nicholas (FFG-47)|USS ''Nicholas'']] and Kuwaiti fast attack craft, KNV ''Istiqal'' capture Iraqi oil platforms.
** 24–29 January – [[Battle of Qurah and Umm al Maradim]] – [[USS Leftwich (DD-984)|USS ''Leftwich'']] and [[USS Curts (FFG-38)|USS ''Curts'']] engage and sink four Iraqi warships.
** 29 January – 2 February – The [[Battle of Bubiyan]] where Coalition warships and aircraft destroy the bulk of the Iraqi Navy during the [[Gulf War]].
** 25 May – [[Eritrean War of Independence|Battle of Assab]] – Eritrean People's Liberation Front sink seven Ethiopian warships in port. Ethiopia's fourteen remaining seaworthy warships get underway and flee Assab before the city's fall. It is the last combat action of the [[Ethiopian Navy]] before its dissolution due to Ethiopia becoming landlocked.
** 8 November – [[History of the Serbian River Flotilla#Yugoslav Wars|Action of Kopacki Rit]] – Yugoslav riverine patrol boat RML-308 was ambushed by Croatian forces on the [[Danube]] off [[Kopački Rit|Kopacki Rit]] while chasing the Czechoslovakian [[Pusher (boat)|towboat]] ''Šariš,'' suspected of smuggling weapons into Croatia. Both ships were severely damaged and stranded, and two Yugoslav servicemen were killed.
** 14–16 November – [[Battle of the Dalmatian Channels]] – Yugoslav fleet engaged Croatian coastal artillery and naval commandos, losing three ships and suffering other damage and several casualties.
* 1994
** 20 September – Sinking of the ''Sagarawardena'' – [[LTTE]] [[Sea Tigers]] suicide boats attack and sink Sri Lankan Navy patrol ship [[SLNS Sagarawardena|SLNS ''Sagarawardena'']].
* 1995
** 19 April – [[Bombing of SLNS Sooraya and SLNS Ranasuru|Bombing of SLNS ''Sooraya'' and SLNS ''Ranasuru'']] – LTTE Sea Tigers frogmen place explosives on Sri Lankan gunboats SLNS ''Sooraya'' and SLNS ''Ranasuru'', sinking them both with heavy casualties.
** 15–17 December – [[Hanish Islands conflict]] – Makeshift Eritrean fleet launches amphibious assault on [[Hanish Islands]], Yemeni aircraft attack the Eritrean fleet in defense.
* 1996
** 19 July – [[Battle of Mullaitivu (1996)|Battle of Mullaitivu]] – Sri Lankan gunboat [[SLNS Ranaviru|SLNS ''Ranaviru'']] is attacked and sunk by LTTE Sea Tiger suicide boats, killing all but two of her crew.
* 1998
** 23 February – The [[Sri Lankan Navy]] and [[LTTE]] [[Sea Tigers]] clash off [[Sri Lanka]], killing more than 60.
* 1999
** 9–15 June [[Battle of Yeongpyeong (1999)|Battle of Yeonpyeong]] South Korean flotilla defeats North Korean flotilla.