Cao Shuang
In September 245, Cao Shuang wanted to make changes to the structure of the military so that he could put his brothers Cao Xi () and Cao Xun () in command of troops. Sima Yi opposed these changes, but Cao Shuang ignored him and went ahead. In January 246, the Wei emperor, Cao Fang, granted Sima Yi the privilege of riding to the imperial court in a type of horse-drawn carriage traditionally reserved for emperors.