Why did Cao Cao fail in the battle of Hanzhong? In the Sino-Korean War, both Cao Cao and Liu Bei were famous soldiers. Liu Bei's situation mainly includes Instruments, Ma Chao, Zhao Yun, Huang Zhong, the imperial court and Huang Quan. Cao Cao's situation is that the generals who participated in the war mainly included Xia, Zhao Xiu, Zhao Jin, Zhang He and so on. Take the war between China and South Korea as an example. Cao Cao abandoned China and South Korea, that is, Liu Bei occupied the land of China and South Korea and died. It is worth noting that Cao Cao was defeated in the Sino-Korean War, but his total strength far exceeded that of Liu Bei. So why take the initiative to give up China and South Korea?

In the Sino-Korean War, the gap between Liu Bei and Cao Cao was very obvious. Liu Bei's situation is that he has just seized Yizhou land, so he has not fully digested and integrated it. Guan Yu of Gyeongju could not support migration excessively under the pressure of Soochow and Sun Quan. Therefore, in the Sino-Korean war, Liu Bei's troops were only tens of thousands. Correspondingly, Cao Cao, who occupied the northern Central Plains, invested more than 65,438+10,000 war horses in the Sino-Korean War. Therefore, Cao Cao has a very obvious advantage in strength. However, in 2 19 AD, Cao Cao voluntarily withdrew from South Korea and transferred the local people, that is, Cao Cao voluntarily gave up the competition between China and South Korea.

As we all know, China and South Korea are the throats of Yizhou. For Shu Han, if we lose the barrier between China and South Korea, we will undoubtedly expose our abdomen to the attack of the enemy. So Cao Cao's situation is that as long as he can control the land of China and South Korea for a long time, it will bring great pressure to Liu Bei. In other words, it will lay an important foundation for the complete elimination of Liu Bei's power. Many people believe that Cao Cao voluntarily gave up China and South Korea because he was defeated in the confrontation with Liu Bei. Of course, in this war that affected the historical process of the Three Kingdoms, judging from the Xia and other generals who died under Cao Cao, Cao Cao's losses were really great. But this is not the main reason for Cao Cao's retreat.

In the Sino-Korean War, Liu Bei also suffered heavy losses. According to historical records such as the History of the Three Kingdoms, Liu Bei also died in the battle of generals such as Ulan, Naodong and Lin Neng. More importantly, Liu Bei's frontline troops are insufficient, men fight and women carry food. It can be seen from the course of the war that Liu Bei's situation is not optimistic. Therefore, if Cao Cao continues to confront Liu Bei, the latter may suddenly collapse. In this regard, the author believes that Liu Bei is also the end of a strong palace, but Cao Cao chose to withdraw his troops for two reasons: on the other hand, Guan Yu, who was eyeing Gyeongju, and Sun Quan of Soochow, Cao Cao could not confront Liu Bei for a long time. Cao Cao has an absolute advantage in military strength. Why did he voluntarily give up China and South Korea? What is the reason?

According to historical records such as The History of the Three Kingdoms, Guan Yu of Qingzhou launched Xiangyang War against Cao Cao in 2 19 AD. Sun Quan of Soochow also targeted Cao Cao's territory. If Cao Cao keeps his main force in Hanzhong for a long time, Guan Yu and Sun Quan are likely to be attacked at the same time. On the other hand, when China and South Korea were at war with Liu Bei, Zhao's grain and grass were mainly shipped from Guanzhong area. Guanzhong is not far from China and South Korea, but there are mountains such as Qinling in the middle, and Cao Cao's army is also facing difficulties in transporting grain. Therefore, due to the obstacles in Qinling and other mountainous areas, Cao's investment is also increasing. So for the decisive Cao Cao, he decided to give up Korea, China and Japan voluntarily in 2 19, and Liu Bei occupied Korea and China, which laid the foundation for the establishment of Shu Han.