The Kragujevac massacre in Serbia

21st October 1941: Wehrmacht troops murder at least 2,300 men and schoolboys in reprisal shooting in the former capital of Serbia

Hostages gathered by the German Army outside the city of Kragujevac. An image taken from a subsequent reconstruction.

Hitler had ordered the occupation of Yugoslavia in April 1941 to secure his southern flank in the Balkans prior to the invasion of Russia. The Germans immediately faced armed resistance, which intensified after the launch of Barbarossa in…