Sima yi was born in 179 A.D. and died #onthisday in history 7th September 251 A.D. he was a politician and general of the state of Wei under Cao Cao in the three kingdoms era. He was remembered for the defending of Wei from the armies of Zhuge Liang’s Northern Expedition. Through the war Sima Yi rose to prominence and success which lead to his grandson Sima Ya to found the Jin Dynasty. In history this would eventually end the three kingdom era, and after that the Jin dynasty was founded in 265 A.D.