WHAT HAPPENED IN 1780.
Look what happened the 1780.

American Revolutionary War: Battle of Cape St. Vincent. (16. January 1780)

American Revolutionary War: Spanish forces capture Fort Charlotte in Mobile, Alabama, the last British frontier post capable of threatening New Orleans in Spanish Louisiana. (14. March 1780)

American Revolution: George Washington grants the Continental Army a holiday "as an act of solidarity with the Irish in their fight for independence". (17. March 1780)

The University of Münster in Münster, North Rhine-Westphalia, Germany is founded. (16. April 1780)

American Revolutionary War: In the largest defeat of the Continental Army, Charleston, South Carolina is taken by British forces. (12. May 1780)

The Cumberland Compact is signed by leaders of the settlers in early Tennessee. (13. May 1780)

New England's Dark Day: A combination of thick smoke and heavy cloud cover causes complete darkness to fall on Eastern Canada and the New England area of the United States at 10:30 A.M. (19. May 1780)

American Revolutionary War: At the Battle of Waxhaws, the British continue attacking after the Continentals lay down their arms, killing 113 and critically wounding all but 53 that remained. (29. May 1780)

American Revolution: Battle of Springfield fought in and around Springfield, New Jersey (including Short Hills, formerly of Springfield, now of Millburn Township). (23. June 1780)

American Revolutionary War: Battle of Camden – The British defeat the Americans near Camden, South Carolina. (16. August 1780)

James Cook's ship HMS Resolution returns to England (Cook having been killed on Hawaii during the voyage). (22. August 1780)

American Revolutionary War: Benedict Arnold gives the British the plans to West Point. (21. September 1780)

American Revolution: British Major John André is arrested as a spy by American soldiers exposing Benedict Arnold's change of sides. (23. September 1780)

Benedict Arnold flees to British Army lines when the arrest of British Major John André exposes Arnold's plot to surrender West Point. (24. September 1780)

John André, British Army officer of the American Revolutionary War, is hanged as a spy by American forces. (2. October 1780)

American Revolutionary War – Battle of Kings Mountain: American Patriot militia defeat Loyalist irregulars led by British major Patrick Ferguson in South Carolina. (7. October 1780)

The Great Hurricane of 1780 kills 20,000–30,000 in the Caribbean. (10. October 1780)

Royalton, Vermont and Tunbridge, Vermont are the last major raids of the American Revolutionary War. (16. October 1780)

Jose Gabriel Condorcanqui aka Tupac Amaru starts his Rebellion on Peru against Spain- (4. November 1780)

French-American forces under Colonel LaBalme are defeated by Miami Chief Little Turtle. (5. November 1780)