(228). However, most of the battles resulted in stalemate and neither side managed to significantly expand its territory.

Sima Yi's Liaodong Campaign

After Guanqiu Jian failed to subjugate the Gongsun clan of the Liaodong Commandery, it was Sima Yi who, in June 238, as the Grand Commandant (??), launched an invasion with 40,000 troops at the behest of Emperor Cao Rui against Liaodong,

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