Editing 1818 (section)

=== April–June ===
[[File:BatallaDeMaipu.jpg|thumb|right|[[April 5]]: [[Battle of Maipú]]]]
* [[April 1]] – [[Seminole Wars#First Seminole War|First Seminole War]] – Battle of [[Miccosukee, Florida]]: General [[Andrew Jackson]] defeats chief Kinhagee.
* [[April 4]] – The [[United States Congress]] adopts the [[flag of the United States]] as having thirteen red and white stripes, and one star for each state (twenty), with additional stars to be added whenever a new state is added to the Union.
* [[April 5]] – [[Chilean War of Independence]] – [[Battle of Maipú]]: Patriot rebels, led by [[José de San Martín]], decisively defeat the Spanish [[Royalist (Spanish American Independence)|Royalist]]s.
* [[April 7]] –  ''[[Brooks Brothers]]'', the oldest men's clothier in the United States, opens its first store on the northeast corner of Catherine and Cherry Streets in New York City, where the later [[South Street Seaport]] stands.
* [[April 14]]–[[August 9]] – The United States Survey of the Coast operations is suspended.
* [[April 18]] – [[John Ross (Arctic explorer)|John Ross]] sets sail on his ship, the ''Isabella'', in search of the [[Northwest Passage]].<ref>Robert Huish, ''The Last Voyage of Capt. Sir John Ross, R.N. to the Arctic Regions'' (J. Saunders, 1835) p77</ref>
* [[May 11]]
** [[Charles XIV of Sweden|Charles XIV]] of [[Sweden–Norway]] is crowned king of [[Sweden]].
** ''[[The Old Vic]] Theatre'' is founded (as the ''Royal Coburg Hall'') in London.
** ''[[The Westmorland Gazette]]'' is first published at [[Kendal]] in the [[Lake District]] of England; in July, [[Thomas De Quincey]] will begin a 16-month term as editor.
* [[June 3]] – [[Baji Rao II]], [[Peshwa]] of the [[Maratha Confederacy]], surrenders to Sir [[John Malcolm]] of the [[British East India Company]], bringing an end to the [[Third Anglo-Maratha War]] and giving the company control of almost all of modern-day [[India]].<ref>{{Citation|title=A History of the Mahrattas|first=James Grant|last=Duff|volume=2|publisher=H. Milford, Oxford University Press|location=London|oclc=61585379|year=1921|editor=[[Stephen Meredyth Edwardes]]|url=https://books.google.com/books?id=e_Pc4ZQMoy0C&q=A+history+of+the+Mahrattas,+Volume+2&pg=PA1|page=513}}</ref>
* [[June 10]] – The British Parliament is dissolved by Prime Minister Jenkinson, and new [[1818 United Kingdom general election|elections are scheduled for August 4]] for the House of Commons.<ref name=Styles>John Styles, ''Memoirs of the Life of the Right Hon. George Canning'', Volume 2 (Thomas Tegg, 1828) pp270-273</ref>
* [[June 11]] – [[William IV of the United Kingdom|Prince William]], [[Duke of Clarence and St Andrews]], third oldest son of King George III and the future King William IV of the United Kingdom, marries [[Adelaide of Saxe-Meiningen]].<ref>John Burke, ''A General and Heraldic Dictionary of the Peerage and Baronetage of the British Empire'' (Henry Colburn Co., 1833) p xxxiii</ref>
* [[June 18]] – At least 34 people are killed in [[Switzerland]], when the melting of a glacier releases the natural dam of [[Lac de Mauvoisin]], sending the waters of the lake and the [[Dranse (Haute-Savoie)|Dranse River]] into the valley of [[Bagnes]].<ref>Jean Frédéric Ostervald, et al., ''Picturesque Tour from Geneva to Milan, by Way of the Simplon'' (R. Ackermann, 1820) pp43-44</ref>
* June – [[Battle of Kafir Qala]]: The Afghans defeat a Persian invasion.{{cn|date=November 2024}}