Battle of Wancheng - S1.E9

Cao Cao conquers Wancheng, Zhang Xiu is defeated and surrenders; Cao Cao mistakenly listens to his nephew An Min's encouragement and takes Zhang's aunt Zou's mother captive. Zhang Xiu is furious, but fearing the courage of Deng Wei, he uses Jia's plan and sends Hu Che to steal Deng's two halberds and attack Cao's camp at night. Zhang Xiu stabbed Zou's mother to death.