Origins & Early Life

Sima Yi (; Chinese: 司馬懿; 179 CE – 7 September 251 CE), courtesy name Zhongda, was a Chinese military general, politician, and regent of the state of Cao Wei during the Three Kingdoms period of China. He formally began his political career in 208 under the Han dynasty's Imperial Chancellor Cao Cao, and was quickly promoted to higher office. His success in handling domestic and military affairs such as governance and the promotion of agriculture, serving as an adviser, repelling incursions and invasions led by Shu and Wu forces, speedily defeating Meng Da's Xincheng Rebellion, and conquering the Gongsun-led Liaodong commandery, garnered him great prestige. He is perhaps best known for defending Wei from a series of invasions that were led by Wei's rival state Shu between 231 and 234.

Pivotal Works & Achievements

In 239, along with another co-regent Cao Shuang, he was made to preside as a regent for the young Cao Fang after the death of latter's adoptive father, Cao Rui. Although amicable at first, the relationship soon deteriorated in light of Cao Shuang's corruption, extravagance, and attempts to curtail Sima Yi's political influence. In February 249, after carefully planning and building up support, Sima Yi ousted...

Enduring Legacy & Impact

The historical impact and works continue to influence the modern world.

Contemporary Figures & Related Historical Timelines

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• 251 Historical Timeline & Archive — Explore world events and figures from 251