Cao Zhen (died 231) was a military general serving under the warlord Cao Cao during the late Han Dynasty period of Chinese history. He served the state of Cao Wei during the Three Kingdoms period. He was also a distant nephew of Cao Cao, though the latter treated him like a son. Cao Zhen participated in many campaigns against the forces of Liu Bei and Sun Quan. From 227 onwards, he was very much involved with successfully repelling the frequent invasions led by Zhuge Liang.
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