In the five days he had been at the front, Zhukov had not yet performed a miracle, but he was attempting to coordinate Russian infantry attacks with meager air and tank strikes. Such an effort needed time. This Stalin would not allow him. When Zhukov called him, pleading for a delay until ammunition arrived in sufficient quantities, Stalin gave him until September 5. On that day, Zhukov launched “human wave” assaults, which crashed into the left flank of the German corridor from the Don to the Volga and immediately foundered. At nightfall, the German corridor was still intact.