In The Netherlands , there was from August 21, 1891 to May 9, 1894 the cabinet Van Tienhoven, with Mr. G. van Tienhoven (unie-liberaal) as prime minister.
February 28 » The USSIndiana, the lead ship of her class and the first battleship in the United States Navy comparable to foreign battleships of the time, is launched.
April 1 » The rank of Chief Petty Officer in the United States Navy is established.
July 9 » Daniel Hale Williams, American heart surgeon, performs the first successful open-heart surgery in United States without anesthesia.
July 11 » The first cultured pearl is obtained by Kōkichi Mikimoto.
August 1 » Henry Perky patents shredded wheat.
August 15 » Ibadan area becomes a British Protectorate after a treaty signed by Fijabi, the Baale of Ibadan with the British acting Governor of Lagos, George C. Denton.
Day of marriage April 30, 1920
The temperature on April 30, 1920 was between 3.7 °C and 12.3 °C and averaged 7.9 °C. There was 4.5 mm of rain. There was 6.4 hours of sunshine (43%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-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.
January 19 » The United States Senate votes against joining the League of Nations.
March 14 » In the second of the 1920 Schleswig plebiscites, about 80% of the population in Zone II votes to remain part of Weimar Germany.
May 3 » A Bolshevik coup fails in the Democratic Republic of Georgia.
May 7 » Kiev Offensive: Polish troops led by Józef Piłsudski and Edward Rydz-Śmigły and assisted by a symbolic Ukrainian force capture Kiev only to be driven out by the Red Army counter-offensive a month later.
August 19 » The Tambov Rebellion breaks out, in response to the Bolshevik policy of Prodrazvyorstka.
November 12 » Italy and the Kingdom of Serbs, Croats and Slovenes sign the Treaty of Rapallo.
Day of death February 15, 1955
The temperature on February 15, 1955 was between -6.2 °C and 0.1 °C and averaged -2.6 °C. There was 0.8 mm of rain during 1.9 hours. There was 5.6 hours of sunshine (56%). The partly clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the east-northeast. Source: KNMI
April 7 » Winston Churchill resigns as Prime Minister of the United Kingdom amid indications of failing health.
May 9 » Cold War: West Germany joins NATO.
July 27 » The Austrian State Treaty restores Austrian sovereignty.
September 20 » The Treaty on Relations between the USSR and the GDR is signed.
December 5 » The American Federation of Labor and the Congress of Industrial Organizations merge and form the AFL–CIO.
December 14 » Albania, Austria, Bulgaria, Cambodia, Ceylon, Finland, Hungary, Ireland, Italy, Jordan, Laos, Libya, Nepal, Portugal, Romania and Spain join the United Nations through United Nations Security Council Resolution 109.
When copying data from this family tree, please include a reference to the origin: Joop Klavers, "Family tree Klavers", database, Genealogy Online (https://www.genealogieonline.nl/stamboom_klavers/I259504.php : accessed February 15, 2026), "Johannes Wachtmeester (1893-1955)".
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