 Complete the following phrase:  Strachwitz participated in the Invasion of Poland in 1939 and in the Battle of France in 1940. Transferred to the 16th Panzer Division he fought in the Invasion of Yugoslavia and Operation Barbarossa, the German invasion of the Soviet Union. He was a recipient of the Knights Cross of the Iron Cross with Oak Leaves, for the Battle of Kalach in the summer of 1942. He received the Swords to his Knights Cross for his actions in the 