What is the biggest reason why Wei can be destroyed? Only blame Zhuge Liang and Sun Quan for their successors.

The talent pool of ancient countries directly affects how far your country can go. Wei, Wu and Shu are three countries, but in the end they can't escape the unification of Wei. This is actually because Wu and Shu lack talents. After Zhuge Liang and Sun Quan died, they began to struggle constantly. They didn't want Wei to stand up and preside over the overall situation without Cao Cao and Sima family. Therefore, the destruction of Wu Shu is almost inevitable, depending on the length of time, and it may take a little longer.

In the later period of the Three Kingdoms, the situation that Wei, Wu and Shu fought side by side gradually collapsed due to the ups and downs of the three forces. Among them, after the death of Cao Rui, the self-proclaimed Wei Emperor, Cao Fang, king of Qi, proclaimed himself emperor, and the power fell into the hands of Sima Yi. After Sima Yi's death, Zi Sima Shi and Si Mazhao came to power successively. On the one hand, Sima's father and son vigorously eliminated Cao Shi's forces, snared the cremation, and after several incidents of abolishing the emperor, they were ready to stand on their own feet as Wei; At the same time, they also paid attention to recruiting talented people, immigrating to the real frontier, continuing Cao Cao's law, popularizing reclamation and building water conservancy projects, which made Wei politically stable, economically developed and militarily powerful under the control of Sima Shi. In contrast, after Zhuge Liang's death, Jiang Wan and Fei Yi assisted the court. They follow Zhuge Liang's established policy, unite internally and don't use troops easily. At one time, Shu maintained a relatively stable situation. After Jiang Wan and Fei Yi, Jiang Wei came to power and fought against Wei many times, which consumed the national strength. Especially after Zhuge Liang's death, Liu Chan became more ignorant, indulged in pleasure and neglected state affairs. Eunuch Huang Hao took advantage of favoritism to form a clique for personal gain. Even Jiang Wei invited himself to plant wheat in the soil (now northwest of Zhouqu, Gannan Prefecture, Gansu Province) for fear of being killed. At this point, the foundation of Shu has been greatly shaken. At this time, after Sun Quan's death, Wu was at home and abroad, and social contradictions became more acute. Many attacks on Wei also ended in failure. Wu's strength has been greatly weakened.

Wei was able to destroy Shu because the former was superior to the latter in politics, economy and military affairs, but the victory or defeat on the battlefield was directly related to the command and planning of both sides. Among these three countries, Wei under Sima's rule is the most powerful, and it has the conditions to destroy Wu and Shu and unify the whole country.

In 262, Cao Huan, Emperor of Wei Yuan, was in power. Wei will analyze the situation at that time, and think that Shu's "learning to be excellent is an official, and everyone knows it now". He decided to take Shu first, and three years later, due to the downstream trend of Bashu, land and water went hand in hand and disappeared. To this end, Wei will be the general of Zhenxi and the commander-in-chief of Guanzhong, ready to attack Shu. At the same time, he threatened to attack Wu first and confuse Shu. Jiang Wei heard the news and reported it to Liu Chan. He suggested sending troops to guard Yang 'an Pass (that is, Yangping Pass in the northwest of ningqiang county, Shaanxi Province) and Yinping Qiaotoubao (in the northwest of Wenxian County, Gansu Province) to make preparations. But the fatuous left only prized eunuch Huang Hao, believing in ghosts and thinking that Wei Jun would not attack, while Liu Chan took Jiang Wei's suggestion for granted, ignored it and didn't even let ministers know.

In the summer of the fourth year of Jingyuan (263), Wei "recruited 180,000 soldiers from all sides" and attacked Shu in three ways: General Deng Ai led more than 30,000 soldiers from Didao (now Lintao, Gansu) to (now southeast of Diebu County, Gansu) and Tazhong to attack Jiang Wei stationed here; Zhuge Xu, the secretariat of Yongzhou, led more than 30,000 people from Qishan (now Qishan Fort in Lixian County, Gansu Province) to Wu Jie (now northwest of Chengxian County, Gansu Province) and Yinping Qiaotoubao, cutting off Jiang Wei's back road; General Zhong Hui of Zhenxi led more than 654.38+10,000 people to March into Hanzhong from Gu Jie (now south of Meixian County, Shaanxi Province), Luogu and Woods Valley (now southwest of Shaanxi Province).

Wei Jun really attacked after Shu, so he rushed to fight. Right general Liao Hua is busy sending a team to meet Jiang Wei. Ride the left chariot general Zhang Yi, assist the Chinese general Dong Jue, and lead another team to Yang 'an Pass to guard the Hanzhong Waizhai.