Cao Shuang
Sima Yi and his sons seized the opportunity to launch a "coup d'état" and take command of the military forces stationed in Luoyang. Sima Yi first sent his supporters to take control of the positions held by Cao Shuang and his brothers: Gao Rou replaced Cao Shuang as Minister over the Masses (司徒); Wang Guan (王觀) replaced Cao Xi as Minister Coachman (太僕). Sima Yi then went to see Empress Dowager Guo and coerce her into issuing an imperial order for the arrest of Cao Shuang and his brothers under charges of treason.