Why did Liu Bei idle Zhang Fei for seven years until he died in Langzhong?

Liu Bei did not let Zhang Fei go to war, but let him stay in Langzhong for seven years. But keeping Zhang Fei in Langzhong is not idle, but reuse, because Langzhong is not an insignificant place, but an extremely important strategic place.

First, Langzhong takes Jialing River and goes back to Baishuiguan, which is the right way to connect Hanzhong and go downstream to Jiangzhou. The east line is not far from Chengdu, and the road is smooth. East, west, north and south are very convenient, so it is extremely suitable to put the reserve team here.

Secondly, according to archaeological evidence, ancestors lived here as early as 5000 years ago. During the Warring States period, it was the capital of Pakistan, where counties, prefectures, prefectures and Taoist temples were set up throughout the ages. Langzhong has always been regarded as the political, military and cultural center of northern Sichuan in ancient times. Secondly, Hanzhong is not regarded as an "important army".

Third, at that time, Wei Yan and Zhang Fei were the candidates for commander-in-chief in Hanzhong and Langzhong. The reason why Wei Yan is not allowed to guard Hanzhong is because Wei Yan is a standard commander and it is more appropriate to guard Cao Wei in Hanzhong. Putting Zhang Fei in Langzhong can also create an offensive, harass Pingping, the military capital, and keep the pressure on Guanlong. If Wei Yan is put in Langzhong, he just sticks to the door with the help of the terrain.

After Liu Bei took Hanzhong, he had the idea of adjusting the eastern route, and Langzhong was undoubtedly the important place in Sichuan. Why Langzhong is an important place in Sichuan? Look at the geographical location of Sichuan.

There is a huge mountain barrier in central and northern Sichuan, which consists of Jianmen Mountain and Daba Mountain Range. There are only two entrances that separate Sichuan from the north.

The first entrance is called Jinniu Road. Taking the side of Jianmen Mountain is the main road for communication between Sichuan and the outside world.

The second entrance is called Micang Road. Take this side of Daba Mountain Range. Langzhong is right here on Micang Road, and Jianmen Mountain and Daba Mountain are both attacking.

There are only two ways to enter Sichuan from the north, but there are many more choices from Langzhong to the south than from Jinniu Road to the south. In other words, Langzhong is a hub checkpoint on Micang Road, which is stuck in the most critical place on Micang Road. After clarifying the terrain near Langzhong, let's talk about the importance of Langzhong to Yizhou.

First of all, it is auxiliary, although it is stated in Taiping Guangji that Micang Road is not easy to walk and its traffic capacity is very weak. However, poor traffic capacity does not mean that you can't go. Micang Road can completely become the auxiliary road of Jinniu Road, the main road.

The second is speed. The disadvantage of Micang Road is that it is difficult to pass, and the advantage is that the road ratio is short. In the past dynasties, Yizhou and the north usually took Jinniu Road, and in an emergency, they took Micang Road.

Then there is defense. Judging from the defense of Shu, Jiange and Langzhong are the must-see places, which are the two locks of the defense system in northern Sichuan. Even if the war situation changes, Langzhong is even more important for Yizhou, the stronghold of Shu State.

From assistance to speed to defense, Micang Road is so important that as the most important hub on Micang Road, Langzhong is self-evident for Yizhou, the base camp of Shu State.

Langzhong is almost the most important place in Chengdu, and it can March northward. The attack of Cao Wei in the north is also the best defensive place. How can you say that Zhang Fei is idle when you put him in a place like this? In fact, it is reuse.