"Well, in that case, it's better to be careful."

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

"The last general obeys!"

Li Chengdong clenched his fists and took the order, and paced out of the Chinese army's tent.

Don't look at Gao Jie's confidence in front of Li Chengdong, in fact, he doesn't have much confidence in this improved version of the 'acupoint attack'.

But after all, this was a method taught by His Majesty himself before he left Nanjing, and he told him to use it when attacking the city. If you don't try to attack such a tough battle, it really can't be said.

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

If he can collapse the city wall, it will be the best, even if it doesn't work, His Majesty can't blame him.

But it was said that 50,000 horses under Gao Jie's command surrounded Kaifeng City, and even a mouse couldn't escape.

Jin Yuhe also made up his mind to stick to the city and not come out, no matter how provocative the soldiers of Gao Jie's department were, they would not respond.

And it's no wonder. After all, the strength of Gao Jie's army must be above Jin Yuhe's commander of the Green Battalion. If he went out of the city to fight, Jin Yuhe felt that he had no chance of winning.

Backed by a strong city, there is still the strength of a battle.

This time, Jin Yuhe led the army to reinforce Kaifeng, and he was actually holding his breath.

Luo Xiujin, the governor of Henan, gave him a strict order and ordered him to ensure that Kaifeng was not lost.

This order seems to be impossible to find fault, but in fact it is extremely ruthless.

The two armies stationed in Henan today are the Huaiqing Mansion Green Camp Army led by Jin Yuhe, and the other is the Weihui Mansion Green Camp Army led by Zu Kefa.

Luo Xiujin's codex only said that Jin Yuhe was called to ensure that the opening was not lost, but he did not mention the responsibility of Zu Kefa, which clearly wanted Jin Yuhe to come to the top of the cylinder.

In this regard, although Jin Yuhe was angry in his heart, he could only swallow his anger.

From Luo Xiujin's attitude, he could see that Zu Kefa would not reinforce him, and whether Kaifeng could hold it or not depended on himself.

In this case, Jin Yuhe must be even more steady and steady, and drag it on as much as possible.

The grain stored in Kaifeng City is enough to eat for half a year, and when the main force of the Eight Banners sweeps away Li Zicheng's class in Shaanxi and returns to the dynasty, the siege of Kaifeng will be solved.

Don't be brave at this time.

It is impossible to rely on only 30,000 green battalion troops to hold the four walls of Kaifeng City.

It was Jin Yuhe who ordered Ding Zhuang to be recruited throughout the city to assist in defending the city.

It is said that it is a conscription, but it is actually a strong man, and men over 16 and under 50 are all listed.

Although Kaifeng has experienced several catastrophes, after all, the foundation is still there, and it is still easy to catch forty or fifty thousand strong men.

In this way, the defenders on each wall were about 20,000, which was barely enough.

Jin Yuhe moved all the city-guarding equipment in the treasury to the city, and he couldn't wait to move the bed to the city tower.

Acting cautiously is his usual style, and there is no room for the slightest mistake in this Kaifeng defense battle.

Jin Yuhe was very nervous at first, but after he found out that Gao Jie's army had begun to dig tunnels, his hanging heart could finally be put down.

Cave attack is one of the siege tactics, but it is not commonly used.

In the final analysis, it is because the pay and return of the acupuncture attack are not proportional.

In general, it takes at least a month to dig a tunnel, and in such a long time, the defenders can do a lot to target the besiegers who are digging the tunnel.

Once there is a problem in one link, the result is a failure.

This tactic has too little margin for error.

Jin Yu and Xindao Gao Jie wanted to use the acupoint attack to seem to feel sorry for the elite under their command, and they didn't want these descendants to die in the siege battle in vain.

But there is no immortal in war. The more he thought about it, the greater the price he would eventually pay.

Of course, Jin Yuhe is happy to see Gao Jie make this choice.

However, he was still ready to prepare in advance for the cave attack to ensure that nothing went wrong.

The purpose of acupuncture is nothing more than two kinds.

The first was to transport a large number of troops into the city through tunnels.

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

Because in order to capture the city gates, there must be enough troops to invest, and there is often more than one tunnel to be dug.

The second purpose was to dig up the foundations of the city walls.

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

One of the advantages of this is that you don't need to dig a lot of strips, just one is enough.

When the soldiers dug under the corner, they just had to dig deeper.

He cut off all the earth under the foundations of the city and put it on top with a hard stake. Eventually, all the soldiers were evacuated from the tunnel, and a fire burned down the wooden stakes in the tunnel. The breach that loses its load-bearing capacity will quickly collapse and the walls will be dug down.

Therefore, it is often possible to roughly determine from the direction of the tunnels dug by the besieging party whether they want to dig down the city wall or send troops into the city through the tunnels.

Although Jin Yuhe had not encountered a cave attack in actual combat, he also understood these simple judgment methods.

To his surprise, the Ming army not only piled up mounds at the corner of the city wall, but also began to dig tunnels at the corner of the city wall.

Jin Yuhe roughly counted, and about the Ming army was digging twelve tunnels at the same time.

What kind of fame does this Gao Jie want to do?

Since he couldn't figure out what Gao Jie wanted to do, Jin Yuhe ordered dozens of water tanks to be buried along the city wall, each of which was covered with cowhide and sent people to listen to it.

As soon as the Ming army dug the tunnel and made a sound, it would be heard by the soldiers who were listening.

Of course, the soldiers in the water tank were able to hear the digging only when the Ming army was very close to the city walls, but it was enough.

After the Ming army dug the tunnel under the city wall, there was still a lot of work to be done, leaving Jin Yuhe with plenty of time.

He had a canal dug along the inner side of the wall, and a large pond was created under each wall.

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

He only needs to pinch the right time and fill the water in the pond into the mouth of the cave, and he can drown the Ming army in the tunnel.

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"Keep it up! It's almost ready! ”

The soldiers digging tunnels outside the east gate encouraged each other to carry a coffin full of gunpowder through the narrow tunnel.

The tunnel was not excavated wide, only the size of a coffin. In other words, the size of the interior of the tunnel is completely dug according to the size of the coffin.

Due to the cover of piling 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 cave attack is to send troops out of the city to the mound and seal the **, and suffocate the besieging soldiers who are digging tunnels to death.

But Jin Yuhe was worried that Gao Jie would lead his army to storm the city gates, so he ordered people to seal all the four city gates with huge stones.

In this way, it is naturally impossible for the Qing army to go out of the city to block the ** under the mound.

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

Because the marshal said that after filling the coffin under the city foundation, it should be withdrawn immediately, only to ensure that the area where the coffin is filled is airtight and that there will be no problems with the gunpowder lead.

In such a short period of time, the soldiers defending the city simply did not have time to divert water to flood the tunnel.

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