First, even if Liu Bei didn't launch the Yiling War, it was impossible to win Guanzhong in one fell swoop, because the national strength of Shu Han was far from that of Cao Wei. Liu Bei's 750,000 troops are somewhat exaggerated, but there are not so many. Shu Han has lost the rich Jingzhou, occupying a week's rating. Compared with Cao Cao, who occupies fertile soil in the north, his national strength, manpower and material resources are enormous. Two thirds of Kyushu is in Cao Cao's hands. He unified the north, strengthened Mazhuang and had a powerful war machine. On the other hand, Shu Han only occupied the barren Yizhou, and there are still minority areas to be developed in the south and middle schools. The strength gap between the two sides is too big.
Second, even if Liu Bei didn't launch the Yiling War and lead 750,000 troops to attack Guanzhong, it was impossible to win Guanzhong in one fell swoop, because Shu Han had consumed more than two years of war potential in Hanzhong War. Yizhou has been in a state of war since Liu Bei entered Yizhou. Liu Bei and Liu Zhang, Liu Bei and Zhang Lu, Liu Bei and Cao Cao have been at war. In the battle of Hanzhong, Cao Cao had to retreat after Huang Zhong's array cut the grain robbed by Xia and Zhang Fei. At this time, both sides were hurt by the war that lasted for more than two years. Liu Bei won the battle of Hanzhong, which was also a tragic victory. The war has reached the point where "men want to fight and women want luck". In addition, Guan Yu's reckless attack on Wei destroyed the rich Jingzhou, and Liu Bei no longer had the strength to wage war. For example, the battle of Yiling launched by Liu Bei and the fight against Sun Quan, who was ten times weaker than Cao Cao in Jiangdong, were all disastrous. It is conceivable that if he fights against the powerful Cao Cao, the failure will only be worse.
Third, even if Liu Bei didn't launch the Yiling War and lead 750,000 troops to attack Guanzhong, it is impossible to win Guanzhong in one fell swoop, because history cannot be changed. After Liu Bei died in Baidicheng, Zhuge Liang went to Wei six times and also came out of Qishan. Jiang Wei, Zhuge Liang's successor, also made nine expeditions to the Central Plains, all of which ended in failure. Since Zhuge Liang came out of the mountain, he set fire to Bowangpo, Xinye, Chibi and the valley above, and made Cao Jun cry and tremble with fear. Some people assume that if Zhuge Liang instead of Liu Bei crusaded against Dongwu, he might win and annex Dongwu. Others said that if Zhuge Liang took the place of Liu Bei to crusade against Soochow, at least he would not have lost so badly and lost 750 thousand troops. Zhuge Liang, ten times stronger than Liu Bei, also lost his troops in the battle with Wei. For the first time, Cao Wei was caught off guard and occupied Tianshui, Nan 'an and Anding counties for a short time. Most of the rest did not achieve substantial results. Therefore, if Liu Bei leads the Shu-Han army to attack Wei, it may not be able to achieve Zhuge Liang's record. The related description in Romance is as follows: After being complacent about the three cities, Kongming was greatly shocked and went to counties far and near. Kongming reorganized his military forces and did his best. Hanzhong, dispatch troops. Before leaving Qishan, go to the west of Weishui.
Fourth, if Liu Bei had not launched the Yiling War and led 750,000 troops to attack Guanzhong, Soochow might have torn up the covenant again, attacked Liu Bei's rear and attacked Shu Han with Cao Wei. At that time, under the pressure of Liu Bei, Wu Dong surrendered to Cao Wei and was named King of Wu by Wei Wendi Xelloss. Sun Quan of Soochow sent Zhu Gejin to Shu Han, offering generous conditions of punishing the murderer, returning Jingzhou, returning his wife and forming an alliance forever, which was rejected by Liu Beiyan. Liu Bei thinks that the revenge of killing his brother Guan Yu doesn't want him to give up the crusade unless he dies. He also told Zhu Gejin to go back and tell Sun Quan to wash his neck and wait for death. The related description in the romance novel is like this: the late Lord was furious and said, "Killing my brother's revenge is useless!" " ! If you want me to stop fighting, I will rest until I die. Don't look at the face of the prime minister, act first and then act. Now let you go back and tell Sun Quan to wash your neck and kill you! "
If the negotiation between Liu Bei and Sun Quan is successful, the hatred between Shu Han and Wu Dong will not be completely solved, but this is only a temporary suppression, and it will break out sooner or later. There are no eternal friends and no eternal enemies. For example, Liu Bei and Cao Wei fought in Guanzhong. At the critical moment, Soochow tore up the Covenant, and it is very likely that they will once again "cross the river in white and raid Jingzhou". If Soochow can break the contract once, it may break it again. Therefore, Liu Bei is brilliant, not blindly attacking Wu, but to solve the worries, first easy and then difficult, first east and then north, then slowly, and then unify China, imitate the story of Guangwu Emperor Liu Xiu, and recreate the Han Dynasty.
Summary: Even if Liu Bei did not launch the Yiling War and lead 750,000 troops to attack Wei, it would be difficult for him to occupy Guanzhong or Chang 'an. Pay attention to the Three Kingdoms, analyze the Three Kingdoms, discuss the Three Kingdoms, and uncover the unsolved mystery of the Three Kingdoms for you.