March 23 » American Revolutionary War: Patrick Henry delivers his speech – "Give me liberty, or give me death!" – at St. John's Episcopal Church, Richmond, Virginia.
May 10 » American Revolutionary War: A small Colonial militia led by Ethan Allen and Colonel Benedict Arnold captures Fort Ticonderoga.
June 12 » American Revolution: British general Thomas Gage declares martial law in Massachusetts. The British offer a pardon to all colonists who lay down their arms. There would be only two exceptions to the amnesty: Samuel Adams and John Hancock, if captured, were to be hanged.
July 8 » The Olive Branch Petition is signed by the Continental Congress of the Thirteen Colonies of North America.
July 29 » Founding of the U.S. Army Judge Advocate General's Corps: General George Washington appoints William Tudor as Judge Advocate of the Continental Army.
August 20 » The Spanish establish the Presidio San Augustin del Tucson in the town that became Tucson, Arizona.
Day of death May 20, 1865
The temperature on May 20, 1865 was about 23.7 °C. The air pressure was 7.5 kgf/m2 and came mainly from the east-northeast. The airpressure was 77 cm mercury. The atmospheric humidity was 49%. Source: KNMI
In The Netherlands , there was from February 1, 1862 to February 10, 1866 the cabinet Thorbecke II, with Mr. J.R. Thorbecke (liberaal) as prime minister.
January 2 » Uruguayan War: The Siege of Paysandú ends as the Brazilians and Coloradans capture Paysandú, Uruguay.
April 2 » American Civil War: Defeat at the Third Battle of Petersburg forces the Army of Northern Virginia and the Confederate government to abandon Richmond, Virginia.
April 9 » American Civil War: Robert E. Lee surrenders the Army of Northern Virginia (26,765 troops) to Ulysses S. Grant at Appomattox Court House, Virginia, effectively ending the war.
May 1 » The Empire of Brazil, Argentina, and Uruguay sign the Treaty of the Triple Alliance.
June 19 » Over two years after the Emancipation Proclamation, slaves in Galveston, Texas, United States, are finally informed of their freedom. The anniversary is still officially celebrated in Texas and 41 other contiguous states as Juneteenth.
July 14 » First ascent of the Matterhorn by Edward Whymper and party, four of whom die on the descent.
When copying data from this family tree, please include a reference to the origin: Charles Olson, "Olson's Tree", database, Genealogy Online (https://www.genealogieonline.nl/olsons-tree/P8334.php : accessed January 2, 2026), "John Hay (1775-1865)".
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