 Complete the following phrase:  This division participated in Operation Barbarossa, advancing through Uman and across the Dnieper River as part of the 1st Panzergruppe commanded by General Von Kleist. It took part in the attack and occupation of Rostov until it was pulled back along with other German troops to the Mius River. In a series of defensive battles during the winter of 194142 it managed to hold its position and then in March 1942 took part in the battles of Kharkov. Later in 1942 the division took part in the drive on Stalingrad. During the latter part of 1942 it was involved in the bitter battles for this city, and then in early 1943 was encircled at 