Editing Torpedo (section)

===World War I===
[[File: Bundesarchiv DVM 10 Bild-23-61-28, Am Torpedorohr.jpg|thumb|Launching a torpedo in 1915 during [[World War I]]]]
[[File:Момент вылета мины из орудия (1916).png|thumb|Torpedo launch in 1916]]

Torpedoes were widely used in [[World War I]], both against shipping and against submarines.<ref name=uboat>{{cite web |url=https://uboat.net/wwi/fates/losses.html |title=U-boat Losses 1914–1918 |website=uboat.net |access-date=10 December 2018}}</ref> Germany disrupted the supply lines to Britain largely by use of submarine torpedoes, though submarines also extensively used guns. Britain and its allies also used torpedoes throughout the war. U-boats themselves were often targeted, twenty being sunk by torpedo.<ref name=uboat/> Two Royal Italian Navy [[MAS (boat)|torpedo boats]] scored a success against an Austrian-Hungarian [[Squadron (naval)|squadron]], sinking the battleship {{SMS|Szent István}} with two torpedoes.

The Royal Navy had been experimenting with ways to further increase the range of torpedoes during World War 1 using pure oxygen instead of compressed air, this work ultimately leading to the development of the oxygen-enriched air [[British 24.5 inch torpedo|24.5 in. Mk. I]] intended originally for the {{sclass2|G3|battlecruiser|2}}<nowiki/>s and {{sclass2|N3|battleship|4}} battleships of 1921, both of which were cancelled due to the [[Washington Naval Treaty]].

Initially, the [[Imperial Japanese Navy]] purchased Whitehead or Schwartzkopf torpedoes but by 1917, like the Royal Navy, they were conducting experiments with pure oxygen instead of compressed air. Because of explosions, they abandoned the experiments but resumed them in 1926 and by 1933 had a working torpedo. They also used conventional [[#Wet heater|wet heater]] torpedoes.