Before Jiang Wei left Hanzhong, he summoned the generals of Hanzhong and warned them that no matter who he took over as the governor of Hanzhong in the future, they would not have to pay attention to them and just act according to their own orders. At that time, Jiang Wei had already secretly put on the move, and Jiang Bin and others naturally followed Jiang Weiyan and acted on orders.

Although Jiang Wei was not sure about his future when he went to Chengdu at that time, his arrangements for the Hanzhong Defense Zone also showed Jiang Wei's carefulness. After all, Jiang Wei also knew that there might be major setbacks and it is always right to prepare for the future after entering Beijing.

In fact, Jiang Wei's arrangement played a considerable role, and the matter was indeed the same as what he expected. Huang Hao conspired to deal with him, hoping to replace Jiang Wei's position in Hanzhong with Yan Yu.

As a result, Jiang Wei made a plan to reconcile the defense zone and took over the Yong'an defense zone himself, and Yan Yu was transferred from the Yong'an governor to the Hanzhong governor.

When Jiang Bin and others saw that Jiang Wei was really imaginative, they couldn't help but admire Jiang Wei. At the same time, they also carried out Jiang Wei's orders without fail, and ignored Yan Yu and ignored Yan Yu's orders.

Yan Yu was angry and annoyed at Jiang Bin and others, and hated him to the core, but he was helpless. After all, Jiang Bin and others had a special identity, came from a famous family, and had great influence in the court. Moreover, they had Jiang Wei support for them, so they naturally did not take Yan Yu seriously. In addition, Jiang Bin and others had the power of military power in Hanzhong. With Yan Yu's current ability, they really couldn't do anything to them.

However, Yan Yu finally found a new breakthrough, that is, the guerrillas scattered around Hanzhong. The guerrillas were not large in number and the larger in size were led by the lieutenant, with a population of more than a thousand people, and the smaller in size was only five or six hundred, and Sima led it.

These guerrillas were also directly under the command of Jiang Wei and were arranged to various outer strongholds. As an important part of the defense system of Hanzhong, the existence of these guerrillas also had a special effect. However, before leaving Hanzhong, Jiang Wei left Hanzhong, he could only summon Jiang Bin, Wang She, Fu Qian and others and explained it. As for the lieutenants and Sima, the positions were relatively scattered and it was not realistic to concentrate them all at once. Jiang Wei could only issue an order to each of them, so that they could strictly follow the established arrangements and not make changes without authorization.

Jiang Wei originally thought they would completely obey his orders, but he didn't expect that they could not withstand Yan Yu's pressure at all, and were forced to obey Yan Yu, and all retreated back to Nanzheng.

This time, Yan Yu used the banner to strengthen Nanzheng's defense and required guerrilla garrisons from all over the country to cooperate with the land. Those who violate military orders will be punished according to the law and will never be forgiven.

If Yan Yu finds other reasons, Jiang Wei has no chance to refute it, but when Jiang Wei hears that Yan Yu is trying to strengthen Nan Zheng's defense, he is so angry that he scolds Yan Yu as a fool, who is a fool, who is a country and a misleading person.

Nanzheng is the county seat of Hanzhong and the largest city in Hanzhong. However, in Jiang Wei's defensive system, Nanzheng did not serve as the city to defend as a key point. Jiang Wei did not neglect it, but made it deliberately.

It is true that Nanzheng is the largest city in Hanzhong, but the big city is defenseless. Jiang Wei is very clear about this disadvantage. The most powerful method of siege of the Wei army is the catapult. Ordinary rammed earth city walls cannot withstand the attack of the Wei army's catapult. If Nanzheng City can withstand the attack of the catapult, it is necessary to upgrade the Nanzheng walls.

However, if you want to replace the city walls of Nanzheng with a stronger brick and stone wall, it will be the heaviest burden for the Shu army, because even if you want to transform all counties like Nanzheng into one, you will be unable to reach it.

Moreover, Nanzheng is located on the Hanzhong Plain. It has a flat terrain and convenient transportation. It is the most reasonable place to be the county governor of a county, but if it is regarded as a fortress, it is completely unqualified.

Therefore, in Jiang Wei's plan to gather troops and gather valleys, Nanzheng sent two thousand troops, and was basically in a state of giving up. If the Wei army really had to fight, Nanzheng City would not have the strength to defend, and it would be lost in a moment.

Relatively speaking, Jiang Wei chose Seoul and Lecheng as the fortresses for defense in the hinterland of Hanzhong.

Seoul is more than 100 miles west of Nanzheng. It was originally named Mianyang. It is north of Dingjun Mountain and on the Mianshui River. It is precisely because of the dangerous mountains and rivers that it has become Jiang Wei’s first choice fortress. Moreover, Seoul itself is not big, so the manpower and material resources required to reinforce such a city will be very small.

Lecheng is about 120 miles east of Nanzheng. Its original name is Chenggu, and it is also on the banks of the Mianshui River and west of Xingshi Mountain. Like Seoul, it is in a very important strategic position and naturally becomes the strategic fortress chosen by Jiang Wei. Like Seoul, it becomes the strategic fulcrum for Hanzhong's defense.

The more important Yangping Pass, also known as Yang'ankou, is the western gateway of the entire Hanzhong and the most important pass connecting Hanzhong and Shu.

Like Lecheng, Seoul, Yangping Pass is also near the Mian River. Mian River is also the upper reaches of the Han River. It is called Mian River in Hanzhong. After it flows to Jingzhou, it is called Han River. Han Mian is actually the same river. Yangping Pass is at the upper reaches of Mian River, Seoul is at the middle reaches, and Lecheng is at the lower reaches. The three major fortresses are all built according to Mian River and arranged into a straight line, with both land connection channels and water connection channels. This is also an important reason why Jiang Wei chose the three major fortresses.

Of course, the more important factor is that these three fortresses are in danger and have the advantages of mountains and rivers. In addition, the brick and stone walls carefully built by Jiang Wei have a miraculous effect in defending the Wei army's catapults.

Due to the terrain and the difficulty of transformation in Nanzheng, it is not within Jiang Wei's consideration. It is true that Nanzheng is the county seat of Hanzhong and the most populous place in Hanzhong, but Jiang Wei did not have the confidence to defend it, so giving up became an inevitable thing.

For Jiang Wei, the gains and losses of one city and one place are not very important. Even if a big city like Nanzheng cannot be defended, it is reasonable to give up. If the gains and losses of Nanzheng are compared with the entire Hanzhong defense system, it would be insignificant.

Jiang Wei has rich experience in war. Whether it is offense or defense, he will consider the problem from a global perspective and make the most reasonable arrangements.
Chapter completed!