Han Xin can go out of Sichuan, but Zhuge Liang can't. Does this mean Zhuge Liang is not as good as Han Xin?

First of all, there is a question I want to discuss with my friends. Han Xin's theory of "building a plank road to hide the truth" is not recorded in Historical Records, Hanshu and Zi Jian. It can be seen that this is just a beautiful legend handed down by storytellers.

However, when Hanwang Liu Bang entered the customs, he did pass through Chen Cang. And these three history books have clear records. As for how Liu Bang got through the difficult-to-attack and difficult-to-defend Chen Cang, we can only analyze it from the situation at that time.

Liu Bang was the first vassal to enter the Guanzhong area. After he arrived in Guanzhong, he made three rules for the local people. During this period, Guanzhong did not suffer from the disaster brought by the war. Later, Xiang Yu and the princes came here and did something completely different. They burned houses on a large scale, killed people and robbed the rich Guanzhong. After hundreds of years of painstaking efforts, the Guanzhong area of Qin people has become a hell on earth. People's hearts turn to their backs, so we can see.

After Xiang Yu and other governors burned and looted in Guanzhong, they left three former generals, Qin Jun, Zhang Han, Dong Kun and Sima Xin, to guard Guanzhong and prevent Liu Bang from leaving Sichuan and Hanzhong. There is nothing wrong with this strategy, but the operating space is very small. Because in Guanzhong people's eyes, these three people are the culprit of this disaster, and Zhang Han and others did not have a basic plan after sealing the king-200,000 Qin Jun were all raped and killed. Although the army is temporarily armed, it has no fighting capacity because of the will of the people, and the army led by Liu Bang is an elite division in the anti-Qin war.

It only took more than half a year from Liu Bangfeng's Bashu to Chencang's northern expedition. It is impossible for Zhang Han to establish a firm rule in Guanzhong in such a short time. For Zhang Han, the people's feelings in Guanzhong area are still in a broken state. Xiang Yu is still fighting Qi in Shandong, thousands of miles away. He has no time to care about it. This provided a window for Liu Bang to leave Sichuan, and when this window passed depended on when the people in Guanzhong really attached themselves to Zhang Han and Xiang Yu. As long as or item cannot establish effective rule here, the window into Guanzhong will always be open to Liu Bang.

In this sense, Liu Bang also decided to go to Sanqin, completely conforming to the situation, and naturally defeated Zhang Han. After more than 400 years, Zhuge Liang's situation in Guanzhong is completely different from that of Liu Bang! Although there were decades of wars at the end of the Eastern Han Dynasty, most of them were concentrated in the relatively stable Central Plains in Guanzhong. The Cao Wei regime established a stable rule in Guanzhong area. Zhuge Liang's departure from Sichuan is obviously a strong confrontation, and any clever plan will eventually come down to the strength level. In the face of the powerful Cao Wei, Zhuge Liang obviously has no advantage. At this time, Chen Cang really became an impregnable fortress. The difficulty of Zhuge Liang's Northern Expedition can be seen.

Therefore, Zhuge Liang made a detour to the west in the Northern Expedition for the first time, and first advanced into Guanzhong through Longxi. His reason is that the rich Guanzhong area is heavily guarded by Wei Jun, and the frontal attack obviously cannot prevail. On the other hand, attacking Longxi can be a surprise. Even if you are blocked in the attack, you can occupy a piece of territory first to avoid wasting your effort. In short, a quick victory is Zhuge Liang's only chance.

At first, Zhuge Liang really took the lead and won the four counties in Longxi. But at the most critical time, there was a deviation in employing people, which led to failure. These four counties have just been occupied by the Shu army, and their ruling foundation is not solid, and they will inevitably fall again. More importantly, Zhuge Liang's actions aroused Cao Wei's vigilance, so that the Shu army lost the opportunity to leave Sichuan, and the window into Guanzhong was missed at this time!

In the next five northern expeditions, Zhuge Liang fought bravely, did what he could and left whenever he could. At the same time, Wei and Wu in the East are constantly at war. Hundreds of thousands of troops from both sides have been facing each other at the border for a long time, and there is always the danger of war. If Wu Wei goes to war, it will be another opportunity for Zhuge Liang. At the same time, because Sima Yi has a strong insight into warlord politics, leading troops to fight for a long time may also lead to the division of Wei, which also brings opportunities to Zhuge Liang. In order to create opportunities, we must attack again and again.

In fact, according to official historical data, although Zhuge Liang's six northern expeditions were magnificent, there were not many real battles. Zhuge Liang knows very well that he can't hand over all his capital at once. How can he exchange the lowest price for the biggest loss of the other party is the most cost-effective way. Even if he takes Guanzhong, it will take a long time to digest. If Cao Wei fought back with all his might, Zhuge Liang could not keep it. The first Northern Expedition was the best lesson.

In fact, it was Zhuge Liang's constant attack that finally led Sima Qian to usurp the Cao Wei regime and split Cao Wei. Wars with Wu are becoming more and more frequent. Unfortunately, people are not as good as the sky. Zhuge Liang died before two opportunities appeared at the same time. Successors Jiang Wan, Fei Yi and Jiang Wei did not have Zhuge Liang's strategic vision and wisdom. After controlling the power of Cao Wei, Sima successfully completed the regime change, stabilized the situation, calmly responded to the attack in Shu, and finally annexed Shu.