三號坦克
The invasion of the Soviet Union in Operation Barbarossa signaled a very important change in German tank development. In June 1941 Panzer III tanks first encountered the Soviet T-34. Initially the Germans had 1,449 Panzer III tanks ready for combat, about 950 of which were versions equipped with the 50 mm L/42 gun, which constituted the Wehrmacht's main tank force. In July 1941 36 panzer and motorized infantry divisions were assigned to the invasion, fielding over 3000 AFVs.