Guo Huai vs Sima Yi

Guo Huai served under Cao Zhen during the first Shu invasion. He provided reinforcements to Zhang He at Jieting, where Zhang He defeated Ma Su, forcing Zhuge Liang to retreat. This victory secured Wei's western border.

Guo Huai defended against Zhuge Liang's second northern expedition. He held the strategic position of Mount Qi, repelling Shu attacks and inflicting heavy casualties. Zhuge Liang withdrew due to supply issues.

Guo Huai participated in the defense against Zhuge Liang's final northern expedition. He commanded a section of the Wei army and helped maintain the stalemate that led to Zhuge Liang's death and the Shu retreat.

Guo Huai led Wei forces against Jiang Wei's invasion of Longxi. He used a pincer movement to trap Jiang Wei's army, forcing him to retreat with heavy losses. This victory solidified Wei control over the western regions.

Guo Huai was appointed Grand Commandant, one of the highest military offices in Wei. He continued to oversee western defenses until his death later that year, maintaining stability against Shu incursions.

Sima Yi led the Cao Wei forces to defeat the Shu Han army at Jieting, forcing Zhuge Liang to retreat. This victory prevented Shu from capturing the Chang'an region and secured Wei's western border.

Sima Yi successfully defended the city of Hefei against an Eastern Wu invasion led by Sun Quan. He repelled the Wu forces, maintaining Wei control over the Huai River region.

Sima Yi staged a coup against the regent Cao Shuang at the Gaoping Tombs. He seized control of the Cao Wei government, executing Cao Shuang and his faction. This event gave the Sima clan effective control over Wei.

Sima Yi died in 251 AD. His descendants later founded the Jin dynasty, fulfilling his ambition. He was posthumously honored as Emperor Xuan of Jin, though he never ruled as emperor himself.