World War II: The Nazis begin a week-long massacre of between 40,000 and 50,000 civilians and prisoners of war in Wola, Poland.

The Wola massacre was the systematic killing of between 40,000 and 50,000 Poles in the Wola neighbourhood of the Polish capital city, Warsaw, by the German Waffen-SS, Ordnungpolizei, Sicherheitdienst and the SS-Sonderregiment Dirlewanger, which took place from 5 to 12 August 1944. The massacre was ordered by Heinrich Himmler, who directed to kill "anything that moves" to stop the Warsaw Uprising soon after it began.

Wola is a district in western Warsaw, Poland. An industrial area with traditions reaching back to the early 19th century, it underwent a transformation into a major financial district, featuring various landmarks and some of the tallest office buildings in the city.