May 29 » In the May Coup, Alexander I, King of Serbia, and Queen Draga, are assassinated in Belgrade by the Black Hand (Crna Ruka) organization.
June 16 » Roald Amundsen leaves Oslo, Norway, to commence the first east–west navigation of the Northwest Passage.
July 20 » The Ford Motor Company ships its first automobile.
September 27 » The Wreck of the Old 97, an American rail disaster that became the subject of a popular ballad.
November 3 » With the encouragement of the United States, Panama separates from Colombia.
November 17 » The Russian Social Democratic Labour Party splits into two groups: The Bolsheviks (Russian for "majority") and Mensheviks (Russian for "minority").
Day of death December 29, 1920
The temperature on December 29, 1920 was between 7.2 °C and 12.2 °C and averaged 9.3 °C. There was 5.5 mm of rain. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the southwest. 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 28 » Azerbaijan is added to the Soviet Union.
July 12 » The Soviet–Lithuanian Peace Treaty is signed, by which Soviet Russia recognizes the independence of Lithuania.
August 11 » The Latvian–Soviet Peace Treaty, which relinquished Russia's authority and pretenses to Latvia, is signed, ending the Latvian War of Independence.
August 20 » The first commercial radio station, 8MK (now WWJ), begins operations in Detroit.
September 17 » The National Football League is organized as the American Professional Football Association in Canton, Ohio.
December 3 » Following more than a month of Turkish–Armenian War, the Turkish dictated Treaty of Alexandropol is concluded.
When copying data from this family tree, please include a reference to the origin: J. Ham, "Family tree Ham", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-ham/I66884.php : accessed February 12, 2026), "Geesje Trompetter (1903-1920)".
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