During the summer, the Axis made significant gains into Soviet territory, inflicting immense losses in both personnel and materiel. By mid-August, however, the German Army High Command decided to suspend the offensive of a considerably depleted Army Group Centre, and to divert the 2nd Panzer Group to reinforce troops advancing towards central Ukraine and Leningrad. The First Battle of Smolensk was fought around the city of Smolensk between 10 July and 10 September 1941, about 400 km (250 mi) west of Moscow.