February 27 » King George I of Greece survives an assassination attempt.
June 10 » Spanish–American War: In the Battle of Guantánamo Bay, U.S. Marines begin the American invasion of Spanish-held Cuba.
July 1 » Spanish–American War: The Battle of San Juan Hill is fought in Santiago de Cuba, Cuba.
August 13 » Carl Gustav Witt discovers 433 Eros, the first near-Earth asteroid to be found.
August 24 » Count Muravyov, Foreign Minister of Russia presents a rescript that convoked the First Hague Peace Conference.
September 21 » Empress Dowager Cixi seizes power and ends the Hundred Days' Reform in China.
Day of marriage August 31, 1921
The temperature on August 31, 1921 was between 4.9 °C and 20.3 °C and averaged 13.2 °C. There was 9.2 hours of sunshine (67%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west. Source: KNMI
In The Netherlands , there was from September 9, 1918 to September 18, 1922 the cabinet Ruys de Beerenbrouck I, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
February 15 » Kingdom of Romania establishes its legation in Helsinki.
March 1 » Following mass protests in Petrograd demanding greater freedom in the RSFSR, the Kronstadt rebellion began, with sailors and citizens taking up arms against the Bolsheviks.
April 11 » Emir Abdullah establishes the first centralised government in the newly created British protectorate of Transjordan.
May 3 » The Government of Ireland Act 1920 is passed, dividing Ireland into Northern Ireland and Southern Ireland.
July 2 » World War I: U.S. President Warren G. Harding signs the Knox–Porter Resolution formally ending the war between the United States and Germany.
September 21 » A storage silo in Oppau, Germany, explodes, killing 500–600 people.
When copying data from this family tree, please include a reference to the origin: J.M. Quist, "Stambomen Quist", database, Genealogy Online (https://www.genealogieonline.nl/stambomen-quist/I7100.php : accessed January 26, 2026), "Jan Johannis Pleune (1898-????)".
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