January 18 » James Cook is the first known European to discover the Hawaiian Islands, which he names the "Sandwich Islands".
February 6 » American Revolutionary War: In Paris the Treaty of Alliance and the Treaty of Amity and Commerce are signed by the United States and France signaling official recognition of the new republic.
February 9 » Rhode Island becomes the fourth US state to ratify the Articles of Confederation.
July 3 » American Revolutionary War: Iroquois allied to Britain kill 360 people in the Wyoming Valley massacre.
August 21 » American Revolutionary War: British forces begin besieging the French outpost at Pondichéry.
September 17 » The Treaty of Fort Pitt is signed. It is the first formal treaty between the United States and a Native American tribe.
Day of death April 23, 1780
The temperature on April 23, 1780 was about 14.0 °C. There was 4 mm of rainWind direction mainly southwest. Weather type: zeer betrokken regen. Source: KNMI
March 14 » American Revolutionary War: Spanish forces capture Fort Charlotte in Mobile, Alabama, the last British frontier post capable of threatening New Orleans.
March 17 » American Revolution: George Washington grants the Continental Army a holiday "as an act of solidarity with the Irish in their fight for independence".
May 13 » The Cumberland Compact is signed by leaders of the settlers in the Cumberland River area of what would become the U.S. state of Tennessee, providing for democratic government and a formal system of justice.
October 2 » American Revolutionary War: John André, a British Army officer, is hanged as a spy by the Continental Army.
November 5 » French-American forces under Colonel LaBalme are defeated by Miami Chief Little Turtle.
November 9 » American Revolutionary War: In the Battle of Fishdam Ford a force of British and Loyalist troops fail in a surprise attack against the South Carolina Patriot militia under Brigadier General Thomas Sumter.
When copying data from this family tree, please include a reference to the origin: R.A.Hemerik, "Descendants Hemerik-Broekhuizen-Huner-Koper-Barink", database, Genealogy Online (https://www.genealogieonline.nl/parenteel-hemerik/I523.php : accessed January 17, 2026), "Leendert Pietersz Admiraal (1778-1780)".
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