In The Netherlands , there was from August 20, 1879 to April 23, 1883 the cabinet Van Lijnden van Sandenburg, with Mr. C.Th. baron Van Lijnden van Sandenburg (conservatief-AR) as prime minister.
In The Netherlands , there was from April 23, 1884 to April 21, 1888 the cabinet Heemskerk, with Mr. J. Heemskerk Azn. (conservatief) as prime minister.
January 16 » The Pendleton Civil Service Reform Act, establishing the United States Civil Service, is enacted by Congress.
May 24 » The Brooklyn Bridge in New York City is opened to traffic after 14 years of construction.
August 25 » France and Viet Nam sign the Treaty of Huế, recognizing a French protectorate over Annam and Tonkin.
October 22 » The Metropolitan Opera House in New York City opens with a performance of Gounod's Faust.
November 9 » The 90th Winnipeg Battalion of Rifles, (later the Royal Winnipeg Rifles) of the Canadian Armed Forces is founded.
December 21 » The Royal Canadian Dragoons and The Royal Canadian Regiment, the first Permanent Force cavalry and infantry regiments of the Canadian Army, are formed.
Day of marriage March 15, 1921
The temperature on March 15, 1921 was between 1.0 °C and 12.4 °C and averaged 7.1 °C. There was 6.2 hours of sunshine (53%). The average windspeed was 3 Bft (moderate breeze) and was prevailing from the south-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 9 » Greco-Turkish War: The First Battle of İnönü, the first battle of the war, begins near Eskişehir in Anatolia.
January 20 » The British K-class submarine HMS K5 sinks in the English Channel; all 56 on board die.
February 25 » Georgian capital Tbilisi falls to the invading Russian forces after heavy fighting and the Russians declare the Georgian Soviet Socialist Republic.
March 15 » Talaat Pasha, former Grand Vizir of the Ottoman Empire and chief architect of the Armenian Genocide is assassinated in Berlin by a 23-year-old Armenian, Soghomon Tehlirian.
July 11 » The Red Army captures Mongolia from the White Army and establishes the Mongolian People's Republic.
July 22 » Rif War: The Spanish Army suffers its worst military defeat in modern times to the Berbers of the Rif region of Spanish Morocco.
Day of death August 12, 1968
The temperature on August 12, 1968 was between 11.4 °C and 20.6 °C and averaged 16.2 °C. There was 9.1 hours of sunshine (61%). The partly clouded was. The average windspeed was 2 Bft (weak wind) and was prevailing from the northwest. Source: KNMI
March 17 » As a result of nerve gas testing by the U.S. Army Chemical Corps in Skull Valley, Utah, over 6,000 sheep are found dead.
August 1 » The coronation is held of Hassanal Bolkiah, the 29th Sultan of Brunei.
September 30 » The Boeing 747 is rolled out and shown to the public for the first time.
October 1 » Guyana nationalizes the British Guiana Broadcasting Service, which would eventually become part of the National Communications Network, Guyana.
October 12 » Equatorial Guinea becomes independent from Spain.
October 26 » Soviet cosmonaut Georgy Beregovoy pilots Soyuz 3 into space for a four-day mission.
When copying data from this family tree, please include a reference to the origin: Sim Mostert, "Genealogy Pot en Smit", database, Genealogy Online (https://www.genealogieonline.nl/genealogie_pot_smit/I527.php : accessed October 15, 2026), "HENDRIKUS JOHANNES KOOPMAN (1883-1968)".
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