After Zhuge Liang's death, Fei Yi took charge of the army and advocated recuperation rather than the Northern Expedition. Faye is smart and talented. Before Zhuge Liang died, he left the retreat of the Northern Expedition to himself. After returning to Chengdu, Fei Yi was in power. Jiang Wei is his subordinate at this time and listens to his orders. Jiang Wei is skilled in martial arts and knows the customs of the northwest like the back of his hand. He tried to conquer Qiang people and Hu people to serve Shu Han. Although this plan is good, it is not recognized by Fei Yi. He believed that Xixia could not be conquered by Zhuge's ability as Prime Minister. They should manage the country well and leave things to capable people. So Jiang Wei often has this idea, Fei Yi gave him less than ten thousand troops. The attack on the northwest was not accepted, and the Northern Expedition needed more manpower and material resources. Once it fails, the cost will be greater, and Fei Yi will not agree. Therefore, although Jiang Wei has the ambition of the Northern Expedition, there is nothing he can do.
When Zhuge Liang died, Jiang Wei's official position was still small, and it took many years to travel south and fight north before he attracted much attention. Although Jiang Wei was very talented, he surrendered to Shu Han late. Even if Zhuge Liang is willing to reuse him, he can't be promoted too quickly. After the army returned to Korea, Jiang Wei was just a general Fu Han, and this position was not high. There were not a few people by that name at that time. This shows that there is still a gap between Jiang Wei and the political center. After Zhuge Liang's death, Jiang Wei led the army to the west for many times, and this was promoted to the general of Zhenxi. Later, Jiang Wei put down the Yi uprising and became a high-profile general. After the assassination of Fei Yi, Jiang Wei, who made great contributions, naturally took over the military power. Jiang Weicai has the right to preside over the Northern Expedition.
After Zhuge Liang's death, the political situation in Shu and Han dynasties was unstable, and the court had no intention of northern expedition for the time being. After the death of Qin Shihuang, young Liu Chan inherited the great cause of reunification. Liu Chan's savings were insufficient, and Zhuge Liang, a respected figure, temporarily stabilized the situation. Now, after Zhuge Liang's death, ministers naturally began to struggle for power and profit. First, the struggle between Wei Yan and Yang Yi. After Zhuge Liang's death, he entrusted his funeral to Yang Yi and Fei Yi, but Wei Yan was unconvinced by Yang Yi. Wei Yan sent troops to stop the army from retreating and was finally killed. Yang Yi has not been reused since he returned to Chengdu. His words of resentment reached the ears of Liu Chan, who was thrown into prison. Soon after, he committed suicide. Fay was also assassinated. After Zhuge Liang's death, many powerful people had an accident, and the political situation in Shu and Han dynasties was unstable, so there was no intention of the Northern Expedition.
In addition, Zhuge Liang's five northern expeditions consumed a lot of manpower and material resources of Shu Han, and Shu Han really needed time to recuperate. Shu Han is newly built and its national strength is not strong. Facing Wei Wu's eyes, Zhuge Liang had to have both offensive and defensive skills. Zhuge Liang made five northern expeditions in seven years, but failed many times. Although Zhuge Liang was resourceful and tried to strive for the best interests of Shu Han, the five northern expeditions consumed Shu Han greatly, and Shu Han really needed decades of rest and recuperation.
The struggle between the three countries is, in the final analysis, a struggle for national strength. Even if Zhuge Liang was resourceful and Jiang Wei was good at leading troops to fight, it would be difficult to win the Northern Expedition with the strength of Shu Han.