March 1 » Battle of Adwa: An Ethiopian army defeats an outnumbered Italian force, ending the First Italo-Ethiopian War.
March 1 » Henri Becquerel discovers radioactive decay.
March 2 » The Battle of Adwa: The Italian Army defeated by the Ethiopian Army in Adwa, Tigray, Ethiopia.
August 17 » Bridget Driscoll became the first recorded case of a pedestrian killed in a collision with a motor car in the United Kingdom.
November 1 » A picture showing the bare breasts of a woman appears in National Geographic magazine for the first time.
November 27 » Also sprach Zarathustra by Richard Strauss is first performed.
Day of marriage November 19, 1931
The temperature on November 19, 1931 was between 2.1 °C and 4.8 °C and averaged 3.7 °C. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the south east. Source: KNMI
In The Netherlands , there was from August 10, 1929 to May 26, 1933 the cabinet Ruys de Beerenbrouck III, with Jonkheer mr. Ch.J.M. Ruys de Beerenbrouck (RKSP) as prime minister.
February 3 » The Hawke's Bay earthquake, New Zealand's worst natural disaster, kills 258.
March 15 » SSViking explodes off Newfoundland, killing 27 of the 147 on board.
March 31 » A Transcontinental & Western Air airliner crashes near Bazaar, Kansas, killing eight, including University of Notre Dame head football coach Knute Rockne.
May 29 » Michele Schirru, a citizen of the United States, is executed by Italian military firing squad for intent to kill Benito Mussolini.
June 23 » Wiley Post and Harold Gatty take off from Roosevelt Field, Long Island in an attempt to circumnavigate the world in a single-engine plane.
December 5 » Cathedral of Christ the Saviour in Moscow was destroyed on orders from Joseph Stalin.
Day of death June 13, 1951
The temperature on June 13, 1951 was between 13.2 °C and 18.4 °C and averaged 15.4 °C. There was 0.1 mm of rain during 0.1 hours. There was 4.0 hours of sunshine (24%). The heavily clouded was. The average windspeed was 4 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
From August 7, 1948 till March 15, 1951 the Netherlands had a cabinet Drees - Van Schaik with the prime ministers Dr. W. Drees (PvdA) and Mr. J.R.H. van Schaik (KVP).
In The Netherlands , there was from March 15, 1951 to September 2, 1952 the cabinet Drees I, with Dr. W. Drees (PvdA) as prime minister.
February 6 » The Canadian Army enters combat in the Korean War.
March 31 » Remington Rand delivers the first UNIVAC I computer to the United States Census Bureau.
April 29 » Tibetan delegates to the Central People's Government arrive in Beijing and draft a Seventeen Point Agreement for Chinese sovereignty and Tibetan autonomy.
May 21 » The opening of the Ninth Street Show, otherwise known as the 9th Street Art Exhibition: A gathering of a number of notable artists, and the stepping-out of the post war New York avant-garde, collectively known as the New York School.
October 3 » Korean War: The First Battle of Maryang San pits Commonwealth troops against communist Chinese troops.
December 24 » Libya becomes independent. Idris I is proclaimed King of Libya.
When copying data from this family tree, please include a reference to the origin: Hans Weening, "Family tree Weening", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-weening/I77559.php : accessed October 5, 2026), "Roelf de Groot (1896-1951)".
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