January 28 » Sir Horace Walpole coins the word serendipity in a letter to a friend.
May 28 » French and Indian War: In the first engagement of the war, Virginia militia under the 22-year-old Lieutenant colonel George Washington defeat a French reconnaissance party in the Battle of Jumonville Glen in what is now Fayette County in southwestern Pennsylvania.
July 3 » French and Indian War: George Washington surrenders Fort Necessity to French forces.
Day of marriage July 30, 1780
The temperature on July 30, 1780 was about 19.0 °C. Wind direction mainly east-northeast. Weather type: zeer betrokken. Source: KNMI
January 16 » American Revolutionary War: Battle of Cape St. Vincent.
March 14 » American Revolutionary War: Spanish forces capture Fort Charlotte in Mobile, Alabama, the last British frontier post capable of threatening New Orleans.
August 22 » James Cook's ship HMSResolution returns to England (Cook having been killed on Hawaii during the voyage).
October 10 » The Great Hurricane of 1780 kills 20,000–30,000 in the Caribbean.
October 16 » The Great Hurricane of 1780 finishes after its sixth day, killing between 20,000 and 24,000 residents of the Lesser Antilles.
November 5 » French-American forces under Colonel LaBalme are defeated by Miami Chief Little Turtle.
Day of death March 8, 1783
The temperature on March 8, 1783 was about 5.0 °C. Wind direction mainly northwest. Weather type: zeer betrokken. Source: KNMI
January 20 » The Kingdom of Great Britain signed preliminary articles of peace with France, setting the stage to the official end of hostilities in the American Revolutionary War later that year.
June 4 » The Montgolfier brothers publicly demonstrate their montgolfière (hot air balloon).
July 24 » The Kingdom of Georgia and the Russian Empire sign the Treaty of Georgievsk.
July 25 » American Revolutionary War: The war's last action, the Siege of Cuddalore, is ended by a preliminary peace agreement.
November 3 » The American Continental Army is disbanded.
December 23 » George Washington resigns as commander-in-chief of the Continental Army at the Maryland State House in Annapolis, Maryland.
When copying data from this family tree, please include a reference to the origin: Peeters Mathieu, "FutureHistory", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-riske/I20571.php : accessed September 28, 2026), "Joannes Cornelius Janssens (1754-1783)".
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