February 14 » Voting machines are approved by the U.S. Congress for use in federal elections.
March 30 » German Society of Chemistry issues an invitation to other national scientific organizations to appoint delegates to the International Committee on Atomic Weights.
July 26 » Ulises Heureaux, the 27th President of the Dominican Republic, is assassinated.
September 13 » Mackinder, Ollier and Brocherel make the first ascent of Batian (5,199 m - 17,058ft), the highest peak of Mount Kenya.
October 11 » The Second Boer War erupts in South Africa between the British-ruled Cape Colony, and the Boer-ruled Transvaal and Orange Free State.
Day of marriage April 20, 1921
The temperature on April 20, 1921 was between -1.3 °C and 10.4 °C and averaged 4.9 °C. There was 4.1 mm of rain. There was 4.9 hours of sunshine (35%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-northwest. 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 21 » Rezā Shāh takes control of Tehran during a successful coup.
March 24 » The 1921 Women's Olympiad begins in Monte Carlo, first international women's sports event.
May 31 » The Tulsa race massacre kills at least 39, but other estimates of black fatalities vary from 55 to about 300.
July 11 » The Red Army captures Mongolia from the White Army and establishes the Mongolian People's Republic.
August 3 » Major League Baseball Commissioner Kenesaw Mountain Landis confirms the ban of the eight Chicago Black Sox, the day after they were acquitted by a Chicago court.
November 4 » The Saalschutz Abteilung (hall defense detachment) of the Nazi Party is renamed the Sturmabteilung (storm detachment) after a large riot in Munich.
When copying data from this family tree, please include a reference to the origin: J.W. Martens, "Family tree Martens IJsselstreek", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-martens-ijsselstreek/I70944.php : accessed June 4, 2024), "Gerrit Jan Post (1899-????)".
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