李牧
As the bulk of the Qin army had left to attack Fei, the Qin camp was poorly defended so Li Mu seized the opportunity to order his troops to launch an offensive on the Qin camp. The Zhao forces scored a major victory in the ensuing battle and captured several prisoners-of-war and supplies. As Li Mu predicted that Huan Yi would retreat from Fei to save the camp, he ordered his men to lay an ambush on Huan Yi's retreat route. Huan Yi's retreating troops fell into the ambush. Qin sustained over 100,000 casualties in the battle and its army was almost completely wiped out. Huan Yi succeeded in breaking out of the encirclement.