April 20 » France declares war against the "King of Hungary and Bohemia", the beginning of French Revolutionary Wars.
April 28 » France invades the Austrian Netherlands (present day Belgium and Luxembourg), beginning the French Revolutionary Wars.
May 11 » Robert Gray commands the first expedition to sail into the Columbia River.
August 13 » King Louis XVI of France is formally arrested by the National Tribunal, and declared an enemy of the people.
September 2 » During what became known as the September Massacres of the French Revolution, rampaging mobs slaughter three Roman Catholic bishops, more than two hundred priests, and prisoners believed to be royalist sympathizers.
September 21 » French Revolution: The National Convention abolishes the monarchy.
Day of death June 20, 1870
The temperature on June 20, 1870 was about 19.4 °C. The air pressure was 6 kgf/m2 and came mainly from the west. The airpressure was 77 cm mercury. The atmospheric humidity was 67%. Source: KNMI
From June 4, 1868 till January 4, 1871 the Netherlands had a cabinet Van Bosse - Fock with the prime ministers Mr. P.P. van Bosse (liberaal) and Mr. C. Fock (liberaal).
February 15 » Stevens Institute of Technology is founded in New Jersey, USA and offers the first Bachelor of Engineering degree in Mechanical Engineering.
March 1 » Marshal F. S. López dies during the Battle of Cerro Corá thus marking the end of the Paraguayan War.
April 13 » The New York City Metropolitan Museum of Art is founded.
June 26 » The Christian holiday of Christmas is declared a federal holiday in the United States.
September 4 » Emperor Napoleon III of France is deposed and the Third Republic is declared.
September 19 » Franco-Prussian War: The siege of Paris begins. The city will hold out for over four months before surrendering.
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/I98097.php : accessed December 27, 2025), "Matthijs Hendrik van Son (1792-1870)".
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