January 2 » American statesman and diplomat John Hay announces the Open Door Policy to promote trade with China.
January 6 » Second Boer War: Having already besieged the fortress at Ladysmith, Boer forces attack it, but are driven back by British defenders.
July 2 » The first Zeppelin flight takes place on Lake Constance near Friedrichshafen, Germany.
August 14 » The Eight-Nation Alliance occupies Beijing, China, in a campaign to end the bloody Boxer Rebellion in China.
September 17 » Philippine–American War: Filipinos under Juan Cailles defeat Americans under Colonel Benjamin F. Cheatham Jr. at Mabitac.
November 7 » Second Boer War: Battle of Leliefontein, a battle during which the Royal Canadian Dragoons win three Victoria Crosses.
Day of marriage April 14, 1921
The temperature on April 14, 1921 was between 2.9 °C and 9.4 °C and averaged 6.4 °C. There was 10.2 mm of rain. There was 4.6 hours of sunshine (33%). The average windspeed was 5 Bft (very strong wind) 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 22 » After Russian forces under Baron Roman von Ungern-Sternberg drive the Chinese out, the Bogd Khan is reinstalled as the emperor of Mongolia.
February 27 » The International Working Union of Socialist Parties is founded in Vienna.
March 18 » The Kronstadt rebellion is suppressed by the Red Army.
March 20 » The Upper Silesia plebiscite was a plebiscite mandated by the Versailles Treaty to determine a section of the border between Weimar Germany and Poland.
March 21 » The New Economic Policy is implemented by the Bolshevik Party in response to the economic failure as a result of war communism.
July 11 » The Red Army captures Mongolia from the White Army and establishes the Mongolian People's Republic.
When copying data from this family tree, please include a reference to the origin: Tjitze Koster, "Family tree Koster Twijslerheide e.o.", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-koster/I3013.php : accessed January 29, 2026), "Fokkina Bergsma (1900-)".
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