April 18 » The Greco-Turkish War is declared between Greece and the Ottoman Empire.
April 30 » J. J. Thomson of the Cavendish Laboratory announces his discovery of the electron as a subatomic particle, over 1,800 times smaller than a proton (in the atomic nucleus), at a lecture at the Royal Institution in London.
June 16 » A treaty annexing the Republic of Hawaii to the United States is signed; the Republic would not be dissolved until a year later.
August 2 » Anglo-Afghan War: The Siege of Malakand ends when a relief column is able to reach the British garrison in the Malakand states.
September 1 » The Tremont Street Subway in Boston opens, becoming the first underground rapid transit system in North America.
September 12 » Tirah Campaign: In the Battle of Saragarhi, ten thousand Pashtun tribesmen suffer several hundred casualties while attacking 21 Sikh soldiers in British service.
Day of marriage September 22, 1921
The temperature on September 22, 1921 was between 7.4 °C and 22.6 °C and averaged 13.8 °C. There was 0.1 mm of rain. There was 6.8 hours of sunshine (55%). The average windspeed was 2 Bft (weak wind) 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.
April 11 » Emir Abdullah establishes the first centralised government in the newly created British protectorate of Transjordan.
June 30 » U.S. President Warren G. Harding appoints former President William Howard Taft as Chief Justice of the United States.
July 11 » Former president of the United States William Howard Taft is sworn in as 10th chief justice of the U.S. Supreme Court, becoming the only person ever to hold both offices.
October 19 » The Portuguese Prime Minister and several officials are murdered in the Bloody Night coup.
October 29 » United States: Second trial of Sacco and Vanzetti in Boston, Massachusetts.
December 22 » Opening of Visva-Bharati College, also known as Santiniketan College, now Visva Bharati University, India.
When copying data from this family tree, please include a reference to the origin: Alexander de Groot, "Family tree De Groot", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-alexander-de-groot/I9344.php : accessed June 8, 2024), "Frederik Leegstra (1897-1961)".
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