Cao Zhen
In late 220, Cao Pi usurped the throne from Emperor Xian, ended the Eastern Han dynasty, and established the state of Cao Wei with himself as the new emperor. Two years later, Cao Pi summoned Cao Zhen to the Wei imperial capital, Luoyang, where he reassigned Cao Zhen to be Senior General of the Upper Army (上軍大將軍), awarded him a ceremonial axe, and put him in charge of supervising military affairs throughout Wei.