January 30 » The first Anglo-Japanese Alliance is signed in London.
May 8 » In Martinique, Mount Pelée erupts, destroying the town of Saint-Pierre and killing over 30,000 people. Only a handful of residents survive the blast.
July 17 » Willis Carrier creates the first air conditioner in Buffalo, New York.
October 24 » Guatemala's Santa María Volcano begins to erupt, becoming the third-largest eruption of the 20th century.
November 21 » The Philadelphia Football Athletics defeated the Kanaweola Athletic Club of Elmira, New York, 39–0, in the first ever professional American football night game.
November 29 » The Pittsburgh Stars defeated the Philadelphia Athletics, 11–0 to win the first championship associated with an American national professional football league.
Day of death September 13, 1969
The temperature on September 13, 1969 was between 13.5 °C and 26.4 °C and averaged 18.7 °C. There was 9.8 hours of sunshine (76%). The almost cloudless was. The average windspeed was 2 Bft (weak wind) and was prevailing from the south-southeast. Source: KNMI
June 23 » IBM announces that effective January 1970 it will price its software and services separately from hardware thus creating the modern software industry.
July 20 » A cease fire is announced between Honduras and El Salvador, six days after the beginning of the "Football War".
July 24 » Apollo program: Apollo 11 splashes down safely in the Pacific Ocean.
August 11 » The Apollo 11 astronauts are released from a three-week quarantine following their liftoff from the moon.
October 8 » The opening rally of the Days of Rage occurs, organized by the Weather Underground in Chicago.
October 29 » The first-ever computer-to-computer link is established on ARPANET, the precursor to the Internet.
When copying data from this family tree, please include a reference to the origin: Van Traa, "Family tree Van Traa", database, Genealogy Online (https://www.genealogieonline.nl/stamboom-van-traa/I979.php : accessed February 18, 2026), "Thade Semeyns de Vries van Doesburgh (1902-1969)".
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