January 5 » Dreyfus affair: French army officer Alfred Dreyfus is stripped of his rank and sentenced to life imprisonment on Devil's Island.
February 9 » William G. Morgan creates a game called Mintonette, which soon comes to be referred to as volleyball.
May 7 » In Saint Petersburg, Russian scientist Alexander Stepanovich Popov demonstrates to the Russian Physical and Chemical Society his invention, the Popov lightning detector—a primitive radio receiver. In some parts of the former Soviet Union the anniversary of this day is celebrated as Radio Day.
June 11 » Paris–Bordeaux–Paris, sometimes called the first automobile race in history or the "first motor race", takes place.
June 27 » The inaugural run of the Baltimore and Ohio Railroad's Royal Blue from Washington, D.C., to New York City, the first U.S. passenger train to use electric locomotives.
June 28 » The United States Court of Private Land Claims rules James Reavis’s claim to Barony of Arizona is "wholly fictitious and fraudulent."
Day of death March 15, 1968
The temperature on March 15, 1968 was between 1.3 °C and 7.7 °C and averaged 4.2 °C. There was 8.8 mm of rain during 5.1 hours. There was 2.3 hours of sunshine (20%). The heavily clouded was. The average windspeed was 3 Bft (moderate breeze) and was prevailing from the west-southwest. Source: KNMI
January 30 » Vietnam War: Tet Offensive launch by forces of the Viet Cong and North Vietnamese Army against South Vietnam, the United States, and their allies.
February 1 » Canada's three military services, the Royal Canadian Navy, the Canadian Army and the Royal Canadian Air Force, are unified into the Canadian Forces.
February 12 » Phong Nhị and Phong Nhất massacre.
April 11 » President Lyndon B. Johnson signs the Civil Rights Act of 1968, prohibiting discrimination in the sale, rental, and financing of housing.
December 25 » Kilvenmani massacre: Forty-four Dalits (untouchables) are burnt to death in Kizhavenmani village, Tamil Nadu, a retaliation for a campaign for higher wages by Dalit laborers.
December 31 » The first flight of the Tupolev Tu-144, the first civilian supersonic transport in the world.
When copying data from this family tree, please include a reference to the origin: Gert Jonker, "Family tree Jonker", database, Genealogy Online (https://www.genealogieonline.nl/jonker_stamboom/I9959.php : accessed March 18, 2026), "Sijke Kingma (1895-1968)".
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