Cao Cao immigrated to Guanzhong

The battle of Tongguan (2 1 1) was a great battle between Cao Cao and the top ten warlords in Guanzhong. This campaign solved the Majia Group, which had occupied Guanzhong for more than ten years, relieved the threat of Cao Cao's regime from the west and further expanded the territory of Cao Wei. After the war, Cao Cao led the troops back to the defense, leaving Xia, Zhang He, Zhang Bi and others stationed in Guanzhong to avoid Ma Chaojun's counterattack.

What would history be like if Cao Cao took Hanzhong and Sichuan in one breath? We rule out all unfavorable conditions for Cao Cao, that is to say, assuming that Cao Cao and Cao Can win Hanzhong and Sichuan, Liu Bei in Jingzhou and Sun Quan in Jiangdong (the Gongsun family in Liaodong, the scholars in the four counties in South China and Jiaozhou can be ignored) will become Cao Cao's last two opponents.

If Cao Cao wins Hanzhong and Sichuan, the next place to bear the brunt is Shang Yong near Hanzhong. Take Liu Bei as an example. After he occupied Hanzhong, he immediately sent Liu Feng and Meng Da to occupy Shang Yong and control the upper reaches of Hanshui River. As a shelter in Hanzhong, the west can March into Wanluo in the east, and the south can threaten the front line of Xiangfan where Cao Ren is holed up. Shang Yong is a place with a very important geographical position. At that time, pro-Liu, pro-Cao and their brothers were stationed in the county.

As soon as Cao Cao captured Hanzhong, it was natural for him to send a partial division down the river to get the agent. The difference is that Cao Cao may spend a little more time than Liu Feng and Meng Da, but it is not a big problem to win the agency in the end. After winning Shang Yong, Cao Cao connected Wanxian County with the front line of Xiangfan, and no longer had to worry about the front line being copied by Shang Yong (Guan Yu asked Liu Feng to send troops to help when he besieged Xiangfan, but thanks to Liu Feng's disobedience, otherwise Coss really could not stand it).

In Yizhou, Cao Cao's army is likely to be stuck in Jiange, but as Zhang Lu who fought with Liu Zhang all his life, he is Cao Cao's brain powder, so Cao Cao won't have much loss in Hanzhong, and Zhang Lu's army can also be the pioneer of Cao Cao's entry into Shu, plus the inventory in Hanzhong. If possible, Lin Ju of Jingzhou can enter Shu and win Yizhou like Liu Bei's two-way attack. But the local gentry in Yizhou still supported Cao Cao. If Cao Cao Can ruled Shu with Shu people, there would be nothing to worry about inside Yizhou. Then, if you send troops to Sichuan and train the water army, Jingzhou will be a disaster at any time.

Under the pressure of the outside world, the Sun-Liu Alliance will become stronger and stronger. However, by this time, Zhou Yu, who created the miracle of Chibi, had passed away (2 10), and Cao Cao was surrounded by five wise men, which was the moment when Zhang Liao had a great impact on xiaoyaojin (2 13). Jiangdong suffered from "Liao phobia" directly after World War I, and Zhang Liao was in Huainan and Cang Ba. In this case, Jiangdong had to face two pressures: helping Liu Bei to resist Cao and defending Zhang Liao in Huainan.

As for Jingzhou guarded by Liu Bei, although there are five tiger generals such as Zhuge Liang, Pang Tong and Ma Liang, the number of its soldiers is limited to Jingzhou, which is not as large as that of Cao Cao's army occupying the north and southwest. Moreover, Cao Bing was divided into two ways: one was to lead Yizhou water army eastward, and the other was to lead the class and the northern army southward from Xiangfan. Now that the southwest has been captured, Cao Cao doesn't need to be heavily guarded in Longyou. Cao Zhang, Cao Zhen and Cao Hong can all be transferred to Jingzhou.

There are too few talents in Liu Bei's group who can fight for water. Only Guan Yu, Chen Shi and others, Zhang Fei and Wei Yan were barely selected, and there were too few strategic positions. They are mainly concentrated in Jiangling area, which is the so-called four counties in the south of Beijing. There is no need to worry about who will be a risk-averse and how quickly they will enter Beijing from Yizhou. Li Bai's "returning a thousand miles to Jiangling in one day" is enough to prove that Lu Xun was most afraid of the combination of Liu Bei's waterway and the two armies. Cao Cao suffered a disastrous defeat in Chibi in front, so he will certainly be cautious when going south again to avoid repeating the mistakes in Chibi.

In fact, if Cao Cao really won Hanzhong and Yizhou, then he formed a strategic encirclement network for Liu Bei and Sun Quan, which could be gradually eroded and finally annexed, while Sun Quan lost Jingzhou and could not enter Huainan, and Liu Bei lost Yizhou, not to mention Longyou's strategy. Strategic development is rigidly confined to the land of Jing, Yang and Jiao, and it is only a matter of time before it is destroyed. Maybe we can retreat to Vietnam and Yizhou (?