As the first country to perish in the Three Kingdoms era, the Shu Kingdom is very sympathetic. Because, the reason why Liu Chan chose to surrender was not because Zhong Hui's large army was approaching the city, but because he was frightened by Deng Ai's army that fell from the sky. In a hurry, he hurriedly sent Zhuge Liang's son Zhuge Zhan to lead troops to resist. At that time, the situation was actually very clear, Zhuge Zhan occupied a geographical advantage, as long as he honestly guarded Mianzhu, he could drag Deng Ai to death.
However, Zhuge Zhan gave up the defense and chose to lead the demoralized Shu army to attack Deng Ai, and finally committed suicide in defeat, which also ruined Liu Chan's last hope. It can be said that Zhuge Zhan is hard to blame for the death of the Shu kingdom.
Therefore, the question arises, as a supporter of the Shu Han clique, I can't help but ask, if Zhuge Zhan defended Mianzhu and defeated Deng Ai, would the Shu state be able to turn the crisis into safety? On the surface, it is. Because at that time, Deng Ai's army had waded all the way through the mountains and rivers, there was no logistical supply, and the soldiers were also injured and sick, which was the momentum of a battle against the water, if Zhuge Zhan could rely on Mianzhu City to prevent Deng Ai from dying, then the Cao Wei clique's plan to cut down Shu would collapse, and Liu Chan and the Manchu Dynasty's civilian generals could quickly calm down, and they would not be frightened and choose to surrender in the case of having a large number of troops.
However, if we look at the more macro situation, the demise of the Shu Han is also inevitable. Even if Zhuge Zhan was invincible and swept away all of Deng Ai's army, Zhong Hui's 100,000 troops were not damaged at all. The main force on the Shu Han side was only about 50,000 people left by Jiang Wei, all trapped in the Sword Pavilion and unable to move. The most passive thing is that Shu Han has lost Hanzhong, which is equivalent to ceding the gateway of Yizhou to Zhong Hui. Therefore, Sima Zhao could send troops to reinforce Zhong Hui at any time, but the morale of the Shu Han side was low, and all the people ran to the mountains to hide, and the 50,000 troops on Jiang Wei's side fought less and less, and it was naturally difficult to save the fate of the Shu state.
In addition to the invasion of Zhong Hui, Eastern Wu, an ally of the Shu Han clique in the past, was not honest. According to historical records, at that time, the Eastern Wu side did not choose to help shu han, but instead took advantage of the fire and robbery, and chose to supply the Bazhou region of Shu Han to the west. Although it was said that no victory was achieved, it greatly restrained the strength of Shu Han, so that Jiang Wei lost the last hope of being rescued. Fortunately, at that time, Eastern Wu only dispatched an army, and if he chose to attack Chengdu against the current, Liu Chan would probably surrender zhonghui before Deng Ai appeared.
In fact, Eastern Wu's approach is understandable. Because since Zhuge Liang's death, although Jiang Wei repeatedly went north, the scale of the Shu Han side was very small, and it could not be used to lead the Cao Wei clique, which made the pressure on Eastern Wu very large. Therefore, seeing that the Shu Han clique may not be able to hold on, Eastern Wu thought of attacking first and snatching the city of Shu Han as a buffer zone with the Cao Wei clique. That is to say, in addition to the internal worries of the Shuhan Group, the external troubles are also huge. Therefore, even if Zhuge Zhan held Mianzhu and defeated Deng Ai, the demise of the Shu state was inevitable, and it was impossible to turn the crisis into safety.