Editing 1786 (section)

=== April&ndash;June ===
* [[April 2]] &ndash; The [[Creek Nation]] declares war on the U.S. [[State of Georgia]] over the matter of white settlers on land not ceded by the Nation. A truce is negotiated on April 17 between Creek Chief [[Alexander McGillivray]] (Hoboi-Hili-Miko) and U.S. Army General [[Lachlan McIntosh]] but is soon repudiated.<ref>Lucian Lamar Knight, ''Georgia's Landmarks, Memorials, and Legends'' (Byrd Printing, 1913) p476
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* [[April 11]] &ndash; Columbia College (modern-day [[Columbia University]]) holds its first graduation, with eight students, including [[DeWitt Clinton]].<ref>Robert McCaughey, ''Stand, Columbia: A History of Columbia University'' (Columbia University Press, 2012) p54</ref> 
* [[April 25]] &ndash; The United States and the Kingdom of Portugal sign their first commercial treaty, but it is never ratified.<ref>Robert Morris, ed., ''The Papers of Robert Morris, 1781-1784: November 1, 1782 – May 4, 1783'' (University of Pittsburgh Press, 1988) p627</ref>
* [[April 27]] &ndash; British astronomer [[William Herschel]] publishes his first list of his discoveries, ''Catalogue of One Thousand New Nebulae and Clusters of Stars''; two additional books are published in 1789 and 1802.<ref>Stephen James O'Meara, ''Deep-Sky Companions: The Caldwell Objects'' (Cambridge University Press, 2016) p534</ref>
* [[May 1]] &ndash; [[Wolfgang Amadeus Mozart|Mozart]]'s opera ''[[The Marriage of Figaro]]'' premieres in [[Vienna]].
* [[May 21]] &ndash; The trial in the [[Affair of the Diamond Necklace]] ends in Paris.
* [[June 2]] &ndash; The [[Tignon law]] is enacted by [[Spanish Governor of Louisiana]] [[Esteban Rodríguez Miró]], to force black women to wear a [[tignon]] headscarf.<ref>{{cite book|title=Creole: The History and Legacy of Louisiana's Free People of Color|date=2000|publisher=Louisiana State University Press|isbn=978-0-8071-4205-9|editor-last=Kein|editor-first=Sybil|location=Baton Rouge|page=62|oclc=703156104}}</ref>
* [[June 6]] &ndash; [[Nathaniel Gorham]] is chosen as the new President of the U.S. Confederation Congress to substitute for John Hancock, who cannot take office because of illness.<ref name="Harper1786">{{cite book|title=Harper's Encyclopaedia of United States History from 458 A.D. to 1909|editor1-last=Lossing|editor1-first=Benson John|editor2-last=Wilson|editor2-first=Woodrow|publisher=Harper & Brothers|year=1910|page=167}}</ref>
* [[June 10]] &ndash; An [[1786 Kangding-Luding earthquake|earthquake]]-caused [[landslide dam]] on the [[Dadu River (Sichuan)|Dadu River]] gives way, killing 100,000 in the [[Sichuan]] province of China.
* [[June 25]] &ndash; [[Gavriil Pribylov]] discovers [[St. George Island (Alaska)|St. George Island]] of the [[Pribilof Islands]] in the [[Bering Sea]].