Editing 1799 (section)

=== January–March ===
* [[January 9]] – British Prime Minister [[William Pitt the Younger]] introduces an [[income tax]] of two [[shilling]]s to the [[pound sterling|pound]], to raise funds for Great Britain's war effort in the [[French Revolutionary Wars]].
* [[January 17]] – [[Maltese people|Maltese]] patriot [[Dun Mikiel Xerri]], along with a number of other patriots, is executed.
* [[January 21]] – The [[Parthenopean Republic]] is established in Naples by French General [[Jean Étienne Championnet]]; King [[Ferdinand I of the Two Sicilies]] flees.
* [[January 27]] – [[French Revolutionary Wars]]: [[Macau Incident (1799)|Macau Incident]] – French and Spanish warships encounter a British [[Royal Navy]] escort squadron in the [[Wanshan Archipelago]] of China inconclusively.
* [[February 9]] – [[Quasi-War]]: In the single-ship action of [[USS Constellation vs L'Insurgente|USS ''Constellation'' vs ''L'Insurgente'']] in the Caribbean, the American ship is the victor.
* [[February 28]] – [[French Revolutionary Wars]]: [[Action of 28 February 1799]] – British Royal Navy frigate [[French frigate Sibylle (1791)|HMS ''Sybille'']] defeats the [[French frigate Forte (1794)|French frigate ''Forte'']] off the mouth of the [[Hooghly River]] in the [[Bay of Bengal]], but both captains are killed.
* [[March 1]] – [[Federalist Party|Federalist]] [[James Ross (Pennsylvania politician)|James Ross]] becomes [[President pro tempore of the United States Senate]].
* [[March 4]] – The Russo-Ottoman [[Siege of Corfu (1798–1799)]] ends with the surrender of the French garrison,<ref>{{cite web|url=http://www.historyorb.com/events/date/1799|title=Historical Events for Year 1799 &#124; OnThisDay.com|website=Historyorb.com|date=October 12, 1799 |access-date=July 11, 2016}}</ref> bringing an end to the first period of [[French rule in the Ionian Islands (1797–1799)]].
* [[March 7]] – [[War of the Second Coalition]]: [[Siege of Jaffa]] – [[Napoleon]] captures [[Jaffa]] in [[Palestine (region)|Palestine]] from the Ottomans and his troops proceed to kill more than 2,000 Albanian captives.
* [[March 14]] – The public premiere of [[Haydn]]’s oratorio ''[[The Creation (Haydn)|The Creation]]'' takes place at the [[Burgtheater]] in Vienna.
* [[March 21]] – War of the Second Coalition: Victory of [[Archduke Charles]] and the Austrian army over the French army of [[Jean-Baptiste Jourdan]] at the [[Battle of Ostrach]].
* [[March 23]] – War of the Second Coalition: Victory of [[Franjo Jelačić]] and the Austrian army over the French army of [[André Masséna]] at the [[Battle of Feldkirch]].
* [[March 25]] – War of the Second Coalition: Victory of [[Archduke Charles]] and the Austrian army over the French army of [[Jean-Baptiste Jourdan]] at the [[Battle of Stockach (1799)]], a key crossroads at the western end of Lake Constance.  
* [[March 29]] – New York passes a law aimed at gradually abolishing [[slavery]] in the state.