 In 1941, Reinhardt and XLI Panzer Corps were deployed on the Eastern Front for Operation Barbarossa, the invasion of the Soviet Union in June.In late June Reinhardt's Corps defeated the Soviet 3rd Mechanised & 12th Mechanised Corps in the Battle of Raseiniai and destroyed over 700 Soviet tanks.His force led the advance of Army Group North to the outskirts of Leningrad in October.