Li Mu, personal name Zuo (繓), courtesy name Mu (牧), was a Chinese military General of the State of Zhao during the Warring States period. He is regarded by Chinese folklore as one of the four Greatest Generals of the Late Warring States period, along with Bai Qi, Wang Jian, and Lian Po. He is widely considered as one of the best defensive tacticians commanders of ancient warfare.

Zhao was one of the seven major states during the Warring States period of ancient China. It emerged from the tripartite division of Jin, along with Han and Wei, in the 5th century BC. Zhao gained considerable strength from the military reforms initiated during the reign of King Wuling, but suffered a crushing defeat at the hands of Qin at the Battle of Changping. Its territory included areas in the modern provinces of Inner Mongolia, Hebei, Shanxi and Shaanxi. It bordered the states of Qin, Wei, and Yan, as well as various nomadic peoples including the Hu and Xiongnu. Its capital was Handan, in modern Hebei province.