One modern example of mobile defense was during World War II during the Third Battle of Kharkov. The German commander Field Marshal Erich von Manstein used II SS Panzer Corps to launch an attack to the rear of the Soviet spearhead force, encircling it. This success led to the stabilization of the German Army Group South. Manstein became a proponent of the use of a strategy of mobile defense on the Eastern Front as a whole. Manstein came to the conclusion that Germany could not defeat Russia in a traditional static defensive system used in World War I and that the only chance to achieve a draw was to wear down the Soviet army in costly mobile battles.