Amsterdam shooting on the Dam, 7 May 1945
1945 CE.
Shown on the map at 52.373°, 4.893°.
The 1945 shooting on Dam square took place during the liberation of Amsterdam on 7 May 1945, in the last days of World War II in Europe. German soldiers fired machine guns into a large crowd gathered in Dam Square to celebrate the end of the war, killing over 30 people.
Text from the Wikipedia article 1945 Dam Square shooting, licensed CC BY-SA 4.0.