After Zhuge Liang s death, why did Sima Yi never fight Shu?

One. First of all, after Zhuge Liang's death, Sima Yi originally took advantage of the situation to attack Shu Han, but he did not get the emperor's permission. According to Chen Shou's record in the "Chronicles of the Three Kingdoms", after Zhuge Liang died of illness in Wuzhangyuan, the Shu Han generals Yang Yi and Wei Yan fought for power after the withdrawal of the army, and Yang Yi killed Wei Yan.

Sima Yi wanted to take the opportunity to attack Shu, but Emperor Cao Rong of Wei Ming was not approved, so the matter could only be stopped. For Emperor Cao Rong of Wei Ming, although Sima Yi was reused in the defense of Zhuge Liang, the Emperor of Wei was still on guard against the Sima clan, who was not a member of the Cao clan. As a result, after Zhuge Liang's threat was eliminated, the Cao clan such as Emperor Cao Rong of Wei Ming obviously did not want Sima Yi to further expand his power by attacking Shu Han.

Two. At the same time, after Zhuge Liang's death, Wei faced a situation of internal and external troubles, which also caused Sima Yi to have no time to attack Shu Han. As far as external troubles are concerned, as early as 233 AD, that is, before Zhuge Liang's death, Sun Quan of Eastern Wu conspired with Zhuge Liang, the prime minister of Shu, and agreed to jointly raise troops to attack Wei.

In 236 AD, after the death of Zhuge Liang, Sun Quan of Eastern Wu went north to Cao Wei and sent Lu Xun, the governor of the right capital, and Zhuge Jin, the central commander, to attack Xiangyang. After that, Eastern Wu Lu Xun, Zhuge Ke and others also attacked Wei, which prompted Wei not to easily mobilize heavy troops to attack Shu Han. Moreover, for Sima Yi, in addition to successfully stopping Zhuge Liang's Northern Expedition, pacifying Liaodong was also one of his major achievements.

Three. As early as the end of the Eastern Han Dynasty, Gongsun Du possessed Liaodong, and this separatist force had always rebelled against Cao Wei and was a major threat to Wei's Northern Expedition. At this historical stage of the Three Kingdoms, Gongsun Yuan succeeded as the Taishou of Liaodong, and he was even more inferior to Wei.

Emperor Wei Ming was furious and sent Jingzhou Thorn Shi Biqiu Jian to serve as Youzhou Thorn Shi, when the Liao water rose sharply, Biqiu Jian was unfavorable and returned. In 237 AD, Gongsun Yuan openly rebelled against Wei, established himself as the king of Yan, and sent an envoy to contact Sun Quan, hoping to attack Wei together. In this context, Emperor Wei Ming could only send Sima Yi to pacify Liaodong, and the latter adopted the strategy of attacking the east and the west, easily defeated Gongsun Yuan, and completely solved the problem of Liaodong.

Four. Finally, on the other hand, as far as internal worries are concerned, the struggle for power between the Sima clan and the Cao clan prompted Sima Yi to have no time to use troops against Shu. In 239 AD, the new emperor Cao Fang ascended the throne, and Cao Shuang, in order to squeeze out Sima Yi, pushed the imperial court to appoint Sima Yi as a prince with no real power.

In 249 AD, Sima Yi counterattacked, launched the Gaopingling Rebellion, successfully annihilated Cao Shuang, and seized the power of Wei. On September 7, 251, Sima Yi died in Luoyang at the age of seventy-three. Thus, in general, after Zhuge Liang's death, Sima Yi was busy with internal and external troubles and did not have a good time to attack Shu Han.

This is because Sima Yi thinks that Shu no longer has much strength, and it is not worth spending troops to fight.

Because Sima Yi has been busy all the time, busy seizing power, he has no time to fight Wu Zhengsun.

Because he has to plan for his own life, Zhuge Liang is dead, he has little meaning to Cao Wei, and he is worried that he will be unloaded and killed Donkey, so he must hurry up to regain power.

Because this old boy is going to pick up ready-made, and he's going to boil everybody else to death, and he's going to win.

Because he thought that Shu Han without Zhuge Liang was no longer a threat to Cao Wei, and he also needed to build his own power, he had no intention of attacking Shu.

Because Sima Yi was worried that his life would not be guaranteed after he wiped out the Shu Kingdom. So after Zhuge Liang died, Sima Yi no longer cut down Shu.

Because Sima Yi knows how to hide clumsy, if he is too popular at this time, although he can destroy the Shu Kingdom, he will definitely attract Cao Cao's jealousy and will invite death.