李牧
In 229 BC, invasions led by the Qin general Wang Jian were opposed by Li Mu and his subordinate officer Sima Shang () until 228 BC. Li Mu was one of the best generals of the Warring States era, and although he was unable to defeat Wang Jian (also one of the best generals of the period), Wang Jian was unable to make headway either. The invasion developed into a stalemate. Realizing that he had to get rid of Li Mu to conquer Zhao, the emperor of Qin, Qin Shihuang, attempted to sow discord among the Zhao leadership. Zhao King Youmiu fell for the scheme: acting on faulty advice from disloyal court officials and Qin infiltrators, he ordered the execution of Li Mu and relieved Sima Shang from his duties. Li Mu's replacement, Zhao Cong, was promptly defeated by Wang Jian. Qin captured King Youmiu and conquered Zhao in 228 BC. Prince Jia, the half-brother of King Qian, was proclaimed King Jia at Dai and led the last Zhao forces against the Qin. The regime lasted until 222 BC, when the Qin army captured him and defeated his forces at Dai.