1 Guan Yu's troops are limited and he can't undertake the task of northern expedition to Cao Wei. Whether in romance or historical facts, the total strength of Guan Yu's army is 5-65438+ 10,000, or even less. Even if there is no need to guard against Wu Dong's attack, it will not pose a great threat to Cao Wei.
After all, Guan Yu and his men moved northward, facing the whole core area of Cao Wei, so they were bound to encounter stubborn resistance from all the main forces of Cao Wei. Without civil strife and political stability in Cao Wei, there is absolutely no possibility of progress.
Part of Jingzhou, controlled by Guan Yu, has become the most vulnerable weakness of Shu Han, and he has won Xichuan and Hanzhong.
Guan Yu's control area is actually only Jiangling, Jingzhou and Wuling areas in Jingzhou, with narrow strategic depth and threats from Wu Dong and Cao Wei. However, in view of the limited national strength of Shu and Han, it is difficult to withdraw troops from Sichuan to strengthen Jingzhou, abandon the Jingxiang Plain, and move the population of Jingzhou to Sichuan, and retreat to Yiling Mountain and Shangyong Area respectively, which is the best choice.
Through the complete Yiling defense line, we can not only ensure the safety of entering Sichuan, but also make public the contradiction between Wu Dong and Cao Wei. The strengthened defenders can also flexibly use the game situation of Jingzhou and Wu Wei to find opportunities. Avoid spending with Wu Dong. Giving up Jingzhou and giving up Longzhong are not the same concept. It is the inevitable repair of Longzhong in the implementation process.
Through the complete Yiling defense line, we can not only ensure the safety of entering Sichuan, but also make public the contradiction between Wu Dong and Cao Wei. The strengthened defenders can also flexibly use the game situation of Jingzhou and Wu Wei to find opportunities. Avoid spending with Wu Dong. Giving up Jingzhou and giving up Longzhong are not the same concept. It is the inevitable repair of Longzhong in the implementation process.
Jingzhou has two functions in Longzhong, one is the foothold of the strategic base in the early stage, and the other is the starting point of attacking Wanluo. For Shu Han, the difficulty of attacking Longyou in Guanzhong from Hanzhong is obviously lower than that of attacking Xiangfan first and then advancing to Xuchang in Wancheng.
Therefore, the role of Jingzhou has become a strategic containment and assistance, so it is an inevitable move to abandon Jingzhou and maintain the influence of the army and population and in this strategic direction. After all, if you want to hold Jingzhou, you must beat back the inevitable attacks of Sun Wu and Cao Wei. This is a very difficult task for the strength of Shu Han in Jingzhou.