曹髦
In the meantime, the Wei general Sima Yi came to power after staging a successful "coup d'état" in 249. After his death in 251, his eldest son Sima Shi succeeded him as regent and consolidated power and control over the Wei government. In 254, Sima Shi deposed the Wei emperor Cao Fang, who tried to seize back power from him, and installed Cao Mao on the throne. Following Sima Shi's death in 255, his younger brother Sima Zhao became the new regent and continued to monopolise power in Wei. In 260, Cao Mao attempted to launch a "coup d'état" to overthrow Sima Zhao but failed and lost his life. Cao Huan, who succeeded Cao Mao as the Wei emperor, remained a puppet ruler under Sima Zhao's influence and control.