"Yeah, since that's the case, it's better to be careful."

Gao Jie ordered Li Chengdong: "First surround Kaifeng City, and then use the method taught by His Majesty to attack!"

"I will obey the order!"

Li Chengdong held his fists and took the order and walked out of the central army's tent.

Although Gao Jie was confident in front of Li Chengdong, he actually didn't have much clue about this modified version of "aper attack".

But this was the method he taught himself before leaving Nanjing, and told him to use it when siegeing the city. If he didn't try a tough battle like the attack and opening the seal, it would be unreasonable.

Even for the sake of His Majesty's face, Gao Jie must try it once.

It would be better if the city wall could be collapsed. Even if it didn't work, His Majesty wouldn't blame him.

However, it was said that Gao Jie's 50,000 troops surrounded Kaifeng City, and he couldn't even escape a mouse.

Jin Yuka also made up his mind to stick to the city and never leave. No matter how the soldiers of Gao Jie's army provoked, they would not respond.

This is no wonder. After all, the strength of Gao Jie's army must be above Jin Yuhe's commanding green camp soldiers. If they go out of the city to fight, Jin Yuhe feels that they have no chance of winning.

There is still a power to fight back against a strong city.

This time, Jin Yuhe led his army to reinforce Kaifeng, which was actually full of anger.

Henan Governor Luo Xiujin issued a strict order to him, ordering him to ensure that Kaifeng is not lost.

This order seems to be indistinguishable, but it is actually extremely vicious.

Nowadays, the two armies stationed in Henan are Jin Yu and the commander of Huaiqing Prefecture Green Camp, and the other is the commander of Weihui Prefecture Green Camp, led by Zu Kefa.

Luo Xiujin's letter only said that he was called Jinyu and ensured that Kaifeng was not lost, but he did not mention Zu Kefa's responsibility. He clearly wanted Jinyu and came to the jar.

In response to this, although Jin Yuhe was angry, she could only swallow her anger.

From Luo Xiujin's attitude, he could see that Zu Kefa would not reinforce him. Whether Kaifeng can be kept depends entirely on him.

Since this is the case, Jin Yuhe must fight steadily and drag it down as much as possible.

The grain stored in Kaifeng City is enough for half a year to eat. When the main force of the Eight Banners cleared Li Zicheng from Shaanxi back to the court, the siege of Kaifeng will be resolved.

Don't show off your courage at this time.

It is impossible to defend the four walls of Kaifeng City with only 30,000 Green Camp troops.

Therefore, Jin Yuhe ordered the recruitment of Ding Zhuang throughout the city to help defend the city.

It is actually to recruit men, and men under 16 or 50 are listed.

Although Kaifeng has experienced several catastrophes, its foundation is still there, and it is still easy to catch 40,000 to 50,000 strong men.

In this way, the defenders on each city wall are about 20,000, which is barely enough.

Jin Yuhe moved all the city guard equipment in the treasury to the top of the city, and wanted to move the bed to the city tower.

He always acted cautiously, and this Kaifeng defense battle would not tolerate any mistakes.

At first, Jin Yuhe was very nervous, but after he discovered that Gao Jie's army began to dig tunnels, his heart was finally ready to let go.

Acupoint attack is a type of siege tactic, but it is not commonly used.

In the final analysis, it is because the efforts and returns of acupoint attack are not proportional.

Generally speaking, it takes at least one month to dig an authentic tunnel. The defenders can do a lot of things to target the siege who dig the authentic tunnel.

Once a problem occurs at a certain stage, the result will be a failure.

This tactical error tolerance rate is too low.

Jin Yu and Xin thought that Gao Jie wanted to attack with a hole, which seemed to be heartbroken by his elite soldiers, and they did not want these direct soldiers to die in the siege in vain.

But there is no way to die in war. The more he thinks this, the greater the price he will pay in the end.

Of course, Jin Yuhe was happy to see Gao Jie make such a choice.

However, he is still preparing to target the acupoint attack in advance to ensure that there is no accident.

The purpose of acupoint attack is nothing more than two types.

One is to transport a large number of troops into the city through the tunnel.

In this case, the tunnel is usually dug directly opposite the city wall.

Because to seize the city gate, there must be enough troops to invest, and there are often more than one tunnel to be excavated.

The second purpose is to dig the foundation of the city wall.

In this case, the tunnel is often dug against the corner of the city.

There is one advantage of doing this, that is, you don’t need to dig many pieces, one is enough.

When the soldiers dig to the corner of the city, just continue digging deeper.

Dig out all the soil under the city foundation, and then top it with hard wooden stakes. Finally, all the soldiers evacuated from the tunnel, burning the wooden stakes in the tunnel with a fire. The gaps that lose load-bearing will collapse quickly and the city walls will be dug up.

Therefore, it is often possible to roughly determine whether they want to dig a city wall or transport troops into the city through the tunnel.

Although Jin Yuhe has never encountered acupuncture in actual combat, he also understands these simple judgment methods.

But what surprised him was that the Ming army not only piled up mounds directly opposite the corner of the city wall, but also began to dig tunnels directly opposite the city wall.

After counting the numbers roughly, the Ming army was digging twelve authentic tunnels at the same time.

What exactly is this Gao Jie trying to do?

Because he couldn't figure out what Gao Jie wanted to do, Jin Yu and his men buried dozens of water tanks along the city wall, each of which was covered with cowhide and sent someone to monitor them.

Once the Ming army digs out the tunnel and makes a sound, it will be heard by the monitored soldiers.

Of course, only when the Ming army was very close to the city wall could the soldiers in the water tank hear the excavation sound clearly, but this was enough.

After the Ming army dug the tunnel under the city wall, there was still a lot of work to do, leaving enough time for Jin Yuhe.

He specially ordered people to dig a canal along the inside of the city wall and stored a large pond under each city wall.

Whether Gao Jie wants to transport troops into the city or dig a city foundation, it will take a lot of time.

He just needed to pinch the right time and pour the water in the pond into the entrance of the cave to drown the Ming army in the tunnel.

......

......

"Try more! It's going to be done!"

The soldiers who dug out tunnels outside the east gate encouraged each other and transported a coffin filled with gunpowder into the narrow tunnel entrance.

This tunnel was not wide and could only accommodate the size of a coffin. In other words, the size of the tunnel was completely dug according to the size of the coffin.

With the cover of piled up mounds, the soldiers did not have to worry about the Qing army in Kaifeng City shooting arrows from the top of the city.

The best way to deal with the attack is to send troops out of the city to the mound and seal the siege soldiers who were digging the tunnel to death.

But Jin Yuhe was worried that Gao Jie would lead his army to attack the city gate, so he ordered people to use huge stones to block all the city gates.

In this way, the Qing army naturally could not leave the city and block the ** under the mound.

As for flooding tunnels, they don't have to worry.

Because the Grand Marshal said that after filling the coffin under the city foundation, it is necessary to withdraw it immediately. It is only necessary to ensure that the area where the coffin is filled is closed and that there will be no problems with the gunpowder leads.

In such a short time, the soldiers guarding the city had no time to dig water and flood the tunnel.

......
Chapter completed!