World War II: American aircraft mistakenly bomb the Dutch towns of Nijmegen, Arnhem, Enschede and Deventer, resulting in 800 dead in Nijmegen alone.

The bombing of Nijmegen on 22 February 1944 was a target-of-opportunity aerial bombing raid by the United States Army Air Forces on the city of Nijmegen in the Netherlands, then occupied by Nazi Germany. In terms of the number of victims, it was one of the largest bombardments of a Dutch city…