January 1 » General George Washington hoists the first United States flag; the Grand Union Flag at Prospect Hill.
March 4 » American Revolutionary War: The Continental Army fortifies Dorchester Heights with cannon, leading the British troops to abandon the Siege of Boston.
April 12 » American Revolution: With the Halifax Resolves, the North Carolina Provincial Congress authorizes its Congressional delegation to vote for independence from Britain.
June 11 » The Continental Congress appoints Thomas Jefferson, John Adams, Benjamin Franklin, Roger Sherman, and Robert R. Livingston to the Committee of Five to draft a declaration of independence.
September 7 » According to American colonial reports, Ezra Lee makes the world's first submarine attack in the Turtle, attempting to attach a time bomb to the hull of HMS Eagle in New York Harbor (no British records of this attack exist).
September 17 » The Presidio of San Francisco is founded in New Spain.
When copying data from this family tree, please include a reference to the origin: Tjitze Koster, "Family tree Koster Twijslerheide e.o.", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-koster/I2708.php : accessed February 12, 2026), "Jitske Linses "Jetske"".
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