The Three Kingdoms become stronger when they get treasures

Chapter 434
If Zhang Wu were here, the first thing that would come to mind would be Boss Cao's Captain Mojin, who specialized in tomb robbery, and would definitely be clear about underground matters.

In addition, Xu Shu also found many local people who were familiar with the terrain. After some exploration and discussion, he finally selected several suitable locations in the south of Nanzheng City.

Why not choose dozens of places to excavate together?There will always be a few tunnels that can be successfully dug under the city wall, and there is no shortage of manpower anyway.

The main reason was that the gunpowder prepared by Zhang Wu was not very powerful, and the city walls of Nanzheng City were very thick. Xu Shu was worried that the gunpowder would not blow down the city walls.

Therefore, Xu Shu first used kerosene bombs, large rocks, etc. to destroy the city wall to maximize the success rate of blasting.

Without further ado, after Xu Shu assembled his army, he immediately sent a large army to besiege Nanzheng. While setting up catapults in the south of the city to attack, he began to dig tunnels from several suitable places to deal with some emergencies.

The catapults of the Chu army kept throwing stones and kerosene bombs at the southern city wall. Cao Jun didn't dare to stay on the city wall. The stone was not very accurate, so he could only blame himself for being crushed to death. But the fuel bomb is hard to hide.

The kerosene bombs were thrown on the city wall. After the crock was broken, the kerosene flowed everywhere and even splashed on people. After being ignited, the entire city wall was covered in flames and could not stand at all.

The kerosene burned at an extremely high temperature, and the bricks on the city wall were burned red, and people burned to ashes after a while.For some reason, the Chu army threw a large amount of kerosene under the city wall, and then set fire to the city wall.

The city wall is so high and thick, can it still be burned down?
But Chu Jun's subsequent actions made Cao Jun even more confused. They even sprayed water on the burning city wall with a thick and long thing.Let’s not talk about what that thick and long thing is, why it can spray water, because they have been fighting with the Chu army for so many years, they can always come up with some weird things, Cao Jun thought that the Chu army wanted to cool down the city wall, Then they will send troops to attack the city.

But after waiting for a long time, the Chu army did not launch an attack. What kind of play is this?

In the camp of the Chu army outside the city, Fazheng said excitedly: "My lord is really a god-man, who actually came up with this thing that can spray water so far!"

It turns out that the thing that can spray water is a big water spray gun. First, the big tree is sawed in half vertically, and then the carpenter hollows out the center of the tree, and digs one side into a semicircle. a hollow cylinder.When using it, one side is blocked, leaving only a small hole, and then filled with water, and the other end is squeezed in with a wooden stick wrapped in cloth, and the water will spray out.

Xu Shu said with a smile: "My lord's whimsical idea, we are also amazed!"

Xu Shu, as the first military adviser to join Zhang Wu, had seen too many strange things invented by Zhang Wu, and he didn't know how to describe them.

Why use water to cool the walls?Because Xu Shu wants to destroy the strength of the city wall, this method has actually been widely spread among the people. After an object is heated at high temperature, and then poured with cold water, the object will be destroyed.

There is a TV drama in which Day Shun invented this method to burn mountains and quarry stones. People use firewood, which can destroy mountains.

After several days of repeated high-temperature heating and spraying water to cool down, Cao Jun finally discovered the changes in the city wall. There were actually some broken bricks on the top of the city wall, and it was obviously not smashed.

Cao Jun who discovered this phenomenon quickly reported it to Cao Hong. Cao Hong was shocked and hurriedly took people to the top of the city to check. Sure enough, some bricks were crushed by him.

"Ah! What, what's going on?" Cao Hong asked in panic. He didn't dare to fight the Chu army head-on now. He could only rely on this city to hold on, and the defender's biggest weapon was this road. city ​​walls.

Du Xi looked at the wall brick solemnly, then looked around, and suddenly realized: "No wonder the enemy wanted to set fire and spray water, so it was to destroy the city wall!"

"What can we do?" Cao Hong asked anxiously.

Du Xi looked at the city wall again, took a rough measurement through his eyes, and said, "Don't worry, general, this city wall is extremely thick, and the enemy can at most destroy some of the outer layer, so it won't collapse."

Cao Hong felt relieved. As long as the city wall did not fall down and there was no shortage of food in the city, with [-] elite soldiers in the city defending the city, there should be no problem in holding on for three months. If that didn't work, people could be recruited to defend the city.

In the next period of time, Xu Shu kept burning and cooling the city wall, and then used a trebuchet to throw large stones to destroy it. The city wall seemed to have a skin disease, and the skin peeled off piece by piece, almost peeling off a layer up.

However, Nanzheng's city walls are indeed thick. It is worthy of being the capital of the great ancestor Liu Bang. It is estimated that Zhang Lu continued to repair Hanzhong when he ruled Hanzhong. When Cao Cao attacked Hanzhong, he also attacked Nanzheng from all directions. , It is estimated that there is no problem in keeping the first half of the year.

Half a month later, the kerosene bombs in Xu Shu's army were exhausted, so they could only continue to smash them with big rocks, but Xu Shu, Zhang Song, Fazheng and others also felt that after such a long time of destruction, the gunpowder was enough to destroy the south. The wall blows up.

After half a month of construction, the excavation team has also dug the tunnel to a very close distance from the city wall, and it is estimated that they will be able to dig under the city wall in another five days.

At the beginning, a total of five sites were selected for excavation. As a result, only two tunnels can continue to be excavated. The other three have encountered a lot of stones. With the simple tools of this era, they must not be able to dig. .

Both Du Xi and Guo Huai are resourceful people, and they will definitely prevent the enemy from digging tunnels, so they have already prepared large tanks under the four walls.When the Chu army dug the tunnel outside the city wall, Cao Jun, who was listening, discovered it.

Du Xi dug a deep ditch horizontally in the city according to the location. As long as the Chu army dared to dig in, they would be found, and then they would be killed by water or smoke!
A few days later, a new situation appeared on the battlefield.

Xu Shu received information that the Pang Tong and Guan Yu armies that had set out from Fancheng had entered Hanzhong along the Hanshui Road and were rushing towards Nanzheng, and it was estimated that they would arrive in ten days.At the same time, Xu Shu also received information from someone sent by Ma Chao that Xiahou Dun, who had set off from Wancheng, had also arrived in Wudu, and was expected to arrive in Nanzheng in ten days.

Although it is a short distance from Fancheng to Hanzhong by taking the Hanshui Road, the road is difficult, and Guan Yu led infantry; although it is far from Wancheng to Hanzhong through Guanzhong, Xiahou Dun led cavalry, and they walked on flat roads all the time. So the two sides arrived almost in time.

Xiahou Dun set off from Wancheng with [-] cavalry, and when he passed through Guanzhong and Liangzhou, he gathered another [-] cavalry, and when he arrived at Xiabian, there were a total of [-] elite cavalry.

Although Ma Chao's subordinates have already recruited thousands of cavalry, they are all Hu cavalry, and their combat effectiveness is far inferior to that of Cao cavalry. At this time, there is a saying that "one Han is five Hu". Qian Huqi faced off against Xiahou Dun's five thousand elite Han cavalry, not to mention the opponent's one thousand most elite tiger and leopard cavalry.

Even with three thousand Xiliang cavalry in hand, Ma Chao dared to confront Xiahou Dun head-on.

Seeing that Xiahou Dun could not be stopped, Ma Chao sent someone to send a letter to Xu Shu, telling Xu Shu to prepare early.

(End of this chapter)