Charles I, Duke of Brunswick-Wolfenbüttel (b. 1713)
Charles (German: Karl; 1 August 1713, Braunschweig – 26 March 1780, Braunschweig), Duke of Brunswick-Lüneburg (Bevern line), reigned as Prince of Brunswick-Wolfenbüttel from 1735 until his death.

1780Mar, 26
Charles I, Duke of Brunswick-Wolfenbüttel
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Events on 1780
- 16Jan
Battle of Cape St. Vincent (1780)
American Revolutionary War: Battle of Cape St. Vincent. - 17Mar
Saint Patrick's Day
American Revolution: George Washington grants the Continental Army a holiday "as an act of solidarity with the Irish in their fight for independence". - 12May
Siege of Charleston
American Revolutionary War: In the largest defeat of the Continental Army, Charleston, South Carolina is taken by British forces. - 21Sep
Benedict Arnold
American Revolutionary War: Benedict Arnold gives the British the plans to West Point. - 23Sep
Benedict Arnold
American Revolution: British Major John André is arrested as a spy by American soldiers exposing Benedict Arnold's change of sides.