Cao Huan - Reign

Reign

At the time Cao Huang became emperor, his name was changed to "Cao Huan", because it was difficult to observe naming taboo with the name "Huang" (which was a homonym to many common terms—including "yellow" (黃) and "emperor" (皇)). During Cao Huan's reign, the Sima clan controlled state power, and Cao was merely a figurehead and head of state in name. In 263, Cao Huan instated his wife Lady Bian as empress.

For the first few years of Cao Huan's reign, there were constant attacks by forces from the rival Shu Han state, under the command of Jiang Wei. While Jiang's attacks were largely easily repelled, Sima Zhao eventually ordered a counterattack on Shu Han, with an invading force of 180,000 men commanded by Zhong Hui and Deng Ai. In late 263, Liu Shan, the emperor of Shu Han, surrendered to Deng, bringing an end to his state. After the fall of Shu Han, Deng was framed for treason by Zhong and stripped of command. In early 264, Zhong plotted with Jiang Wei to restore Shu Han and eliminate all the Cao Wei generals who might oppose him. However, the generals started a counterinsurgency and killed Zhong and Jiang. Shu Han's former territories (in present-day Sichuan, Chongqing, Yunnan, southern Shaanxi, and southeastern Gansu) were completely annexed by Cao Wei.