 Complete the following phrase:  In June 1941 with the launching of Operation Barbarossa, Kleist led the 1st Panzer Group as part of Army Group South - tasked with the capture of Moldavia and Ukraine - and saw success in the initial phase of the invasion, advancing deep into Ukraine. The 1st Panzer Group broke through the Stalin Line, then defeated the five mechanized corps of the Soviet 5th Army and 6th Army in the Battle of Brody 23 to 30 June 1941. In July 1941 during the 