March 6 » Bayer registers "Aspirin" as a trademark.
March 27 » Emilio Aguinaldo leads Filipino forces for the only time during the Philippine–American War at the Battle of Marilao River.
March 31 » Malolos, capital of the First Philippine Republic, is captured by American forces.
September 13 » Mackinder, Ollier and Brocherel make the first ascent of Batian (5,199 m - 17,058ft), the highest peak of Mount Kenya.
September 23 » The American Asiatic Squadron destroys a Filipino battery at the Battle of Olongapo.
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 November 12, 1920
The temperature on November 12, 1920 was between 2.1 °C and 6.0 °C and averaged 4.1 °C. There was 0.3 mm of rain. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south. 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.
January 23 » The Netherlands refuses to surrender the exiled Kaiser Wilhelm II of Germany to the Allies.
January 28 » Foundation of the Spanish Legion.
February 10 » Józef Haller de Hallenburg performs symbolic wedding of Poland to the sea, celebrating restitution of Polish access to open sea.
April 23 » The Grand National Assembly of Turkey (TBMM) is founded in Ankara. The assembly denounces the government of Sultan Mehmed VI and announces the preparation of a temporary constitution.
August 26 » The 19th amendment to United States Constitution takes effect, giving women the right to vote.
November 16 » Qantas, Australia's national airline, is founded as Queensland and Northern Territory Aerial Services Limited.
When copying data from this family tree, please include a reference to the origin: J Eijsermans, "Eijsermans family tree", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-eijsermans/I322907.php : accessed January 8, 2026), "Joanna Antonia Henrica Wirken (1899-????)".
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