Today in history: In 1352, on the first day of February in the twelfth year of Zhengzheng, Guo Zixing conquered Haozhou.

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Xu Ren sent a man, tall and fat, riding a thin horse, leading several personal soldiers, and staggering. Deng She greeted him upside down, and when he went to the outside of the tent, he saw that he was an acquaintance. He remembered clearly, known as "Fu Da Life", and the person who made great contributions when he broke the Yuan army a few days ago was named Liu Yang.

It turned out that Deng She thought about it and was inspired by Xu Ren, thinking that the only way to break the city quickly was to dig tunnels. Therefore, at the military meeting, he asked Xu Ren if he could stay and assist, Xu Ren definitely couldn't stay, but he recommended a person who was also good at this, and he didn't say his name at the time, but he didn't expect it to be him.

Deng She was stunned, then laughed, and without waiting for Liu Yang to approach, he stepped forward first, held his hand, and said, "I heard General Xu say that he wanted to introduce a capable person to this general, but he turned out to be an old acquaintance." ”

Liu Yang was originally a hundred households, but he was promoted by Deng She's line of fire and promoted to a deputy thousand households, and Deng She had the grace to know him; But because his official son was promoted by Deng She, Xu Ren and Li Jing admitted that after Zheng Sanbao went, he had a lot of complaints, so he was willing to come to Deng She's army.

He said with a smile: "The praise of capable people is really too good, and the last general is not talented, and he is willing to serve the general." ”

Deng She was a little puzzled, but he clearly remembered that this person was born as a thief, how could he be good at authentic techniques? The stakes are very high, not child's play, he looked at it a few times, and while pulling Liu Yang into the tent, he asked, "Isn't my brother from a business background?" How ......? ”

Liu Yang smiled innocently: "Don't hide it from the general, before the last general did business, he worked as a miner for a few years." General Xu was the last general's acquaintance at that time. ”

"Oh,......" Deng She suddenly realized, praised, and said, "People can't look good, I didn't expect General Liu to have such a rich experience." ”

"Where, where." Liu Yang was modest and said, "I know a little bit about it, I just know a little bit about it." ”

"Haha, please come in." Dunsher took him by the hand, and the two of them walked into the tent. It was cold outside the tent, and the heat inside the tent was like spring, Deng She's ordered someone to bring hot soup, asked Liu Yang to warm up, chatted a few words about what he saw and heard after saying goodbye, and briefly talked about the current war, the topic changed, and he got to the point, and said: "The reason for asking brother, General Xu has already told you." ”

"Yes."

"Time is short, let's just say it." Deng She asked, "If we dig a tunnel from my camp and enter the enemy city, how many days will it take?" ”

Liu Yang got up from his seat, squatted in front of the map, measured it with his hands, pondered for a moment, and said: "If there are enough people, it will take two or three days at most." ......, but there is one point, the situation in the city is not very clear, the general knows, the tunnel this thing, let's dig underground, if the other party has someone who is good at this way, he can use all kinds of means to detect and hear. ”

Dunsher had heard of this. He vaguely remembered that the way to crack the tunnel was very simple, make an urn, put it in the right place, and the enemy's movements under the ground could be heard clearly.

"Digging tunnels can easily cause changes in the water level. There are wells in the city, and the water level in the wells is very likely to be lowered as a result, which is also a means of detection. Speaking of professionalism, Liu Yang said, "The most important point,...... "General, I don't know if there are trenches in the city?" ”

He meant to ask if the Yuan army had dug a second, or even a third, trench in the city. When Qing Qianxing attacked the twin cities, Deng She used this method of defending the city, which had two advantages: first, it could create a defensive line after the enemy broke through the city gate and laid down the city wall; Second, if the trench is dug deep enough, it can also prevent the enemy from digging tunnels into the city.

Deng She recalled what he had seen on the watchtower: "There seems to be a ravine. ”

"That's going to be hard. Digging tunnels is an underground operation, and you can't see the reality clearly, or you don't know the city well, it's too risky. When the tunnel collapses, none of the soldiers will survive. ”

All of the above are methods for detecting tunnels, and there are several tactics to crack tunnels. First, after detecting the direction of the enemy's tunnel, try to collapse it; Second, smoke into the tunnel with fireworks and poisonous smoke, and you can also pour water to repel the enemy; Third, at the entrance of the tunnel, set up ambushes; Fourth, send warriors, also go down into the tunnel, and fight the enemy hand-to-hand, this method is a bit of a defensive for the offensive, because if it goes well, it is possible to kill along the enemy's tunnel, but to seize the enemy's camp.

Deng She listened, and really specialized in the art industry: "Has my brother ever had a real battle?" ”

"With General Xu, there have been twice." Liu Yang was ashamed, "One success, one failure." ”

With a fifty percent chance of winning, Deng She couldn't help but hesitate. If you want to talk about war, there is no 100% certainty, and the odds of winning are five or sixty percent, but he can't afford to waste time. Liu Yang observed his words and said, "Is the general worried about the casualties of the soldiers in vain?" ”

Xu Ren's mouth was very strict, and he didn't tell him about the Twin Cities Rebellion.

Deng She was noncommittal, and Liu Yang said: "Actually, the last general has an idea, I don't know if it's suitable or not." ”

"Tell me about it."

"I wonder if the gunpowder in the general's army is sufficient?"

"It's not much, but it's enough."

"If this is the case, this tunnel does not have to be dug into the city of Gaizhou. Under the cover of an army, dig under the city walls, then pile up gunpowder under the city and set it on fire. The last general saw that the wall of Gaizhou was not very strong, and it was enough to blow it up. ”

Deng She patted his head, he still didn't have enough qi cultivation, he was worried that there were too many twin cities, and his brain was turning slowly, why did he forget this trick? When Wenhua Guo fought the Goryeo army in the west pass of Shuangcheng, he used it once, and the gunpowder broke the enemy camp, which had the same effect.

Although there are still ditches in the city, and the city wall collapses, it is inevitable that there will be a fierce battle; But it is also much stronger than the siege. Immediately clapped, he said: "Okay! This is a good solution, just do as you say. ”

There is a lot of preparation to dig a tunnel. It is necessary to survey the geology, select the route of the project, plan the layout, and then make the construction plan and select the construction technology, especially the long-distance slag transportation and long-distance ventilation, which are all very technical.

It was only dug under the city wall, which reduced a lot of difficulties and time, and in terms of the amount of construction, it was still very heavy. It is impossible for the Yuan army in the city to sit idly by, go out of the city to harass and destroy, and there is no suddenness, and it cannot play the role of a surprise soldier.

Therefore, the tunnels had to be dug up from the camp.

Liu Yang went out of the camp overnight, took three or two people, and took advantage of the cover of night to carefully observe the terrain and explore the geology. In accordance with his request, Deng She ordered the three armies to prepare various tools and transfer manpower. At the same time, he ordered the front line to start digging trenches, on the one hand, to assume the posture of a long-term siege and paralyze the enemy; On the one hand, the soil excavated by digging a trench is used to cover up the soil that is transported when digging the tunnel.

"How many people can be hidden in a tunnel?"

"The camp is only a few miles away from Gaizhou. At best, there are only dozens of people in one tunnel. ”

Those who dare to fight underground and go deep behind enemy lines must die lightly; Fortunately, the purpose was only to blow up the city wall, and it didn't take many people, and Deng She didn't go to the army to choose, so he chose more than a dozen brave soldiers from the nearby brother team and pro-soldier team; Give him good wine and meat, make an exception, and allow him to drink before the tunnel is dug.

Chen Hu brought military prostitutes from the army, and he also selected young and beautiful people and sent them over for their enjoyment.

Here to appease and encourage the commandos not to mention it. Liu Yang worked very quickly, and soon after dawn, the plan had been made, and under the cover of layers of tents, the project began. For the sake of secrecy, Deng She sent rangers to sweep the surrounding five miles, forbidding soldiers from leaving the camp, and more than 10,000 Chinese troops went all out to devote themselves to the hot excavation.

In terms of digging for three days, Mao Jujing has broken through, tens of thousands of people surround Gaizhou City, do not fight or retreat, and then dig a trench to paralyze, maybe it will also arouse the suspicion of the Gao family slaves. Deng She called Zhao Guo and made a feint attack two or three times a day, and the Chinese army also transferred some military horses to bluff.

Any civilian technology will be used in the military. This method of digging tunnels is no exception, born out of mine operations; It is in the same vein as the technology of digging mines. Like digging a well, first dig down a few feet deep, and then cross it to open up a roadway. The soil excavated in the cave is taken out of the well that was first penetrated, and the tools used to take the soil can be baskets or wooden planks, tied to ropes, and pulled out.

These are relatively simple tools, and in a hurry, they cannot be purchased with the most formal and suitable tools for taking soil.

Depending on the length of the tunnel, some will also erect pillars in the tunnel. At intervals, use stone pillars or wooden pillars to support the top and bottom to avoid collapse. Since ancient times, mine collapse accidents have emerged one after another, and the tunnel is short and the time it takes is short, so as long as there is a professional guide in this regard, it is much safer.

Every half mile, it is necessary to dig up diagonally to dig an airway for ventilation, which is called a "whistle eye". There is no air circulation underground, and it is not enough to rely on the freshly dug wells to supply fresh air, and without this whistle, people will suffocate to death.

The most critical point is that there is a moat outside Gaizhou City, which is not very deep, but digging tunnels has to be counted in it. How deep you need to dig to avoid the bottom of the moat. The soil at the bottom of the river is very silty, and if the river is three meters deep, the tunnel must be at least three meters deeper than the bottom of the river.

Liu Yang was conscientious and climbed to the forefront every day, not only commanding, but also digging with his own hands. The excavated soil was first packed into bags along with the trenches dug at the front; Later, there were too many, and a team of soldiers was dedicated to pull them out under the cover of things.

The project went smoothly, and Gao Jianu was unaware of it. Zhao Guobu attacked non-stop day and night, Chen Hubu reported three times a day, the trapped Japanese people ran out of food, and two squads came out of the camp in the middle of the night last night and demanded surrender. Chen Hu was annoyed that it had lost face and was not surrendered, so he beheaded it all under the no-kill card.

He cut first and then played, and only reported to Deng She after killing, Deng She's attention was all in the tunnel, he didn't care at all, he only smiled, and said: "Kill again, not under the no-kill card." ”

On the evening of the third day, the tunnel was dug under the city walls. Liu Yang came to ask for instructions in a disgraced manner: "General, do it now, or wait?" ”

Deng She couldn't wait, looked at the sky, and asked Yang Wanhu and the others: "How are the troops prepared?" ”

Yang Wanhu rubbed his hands, watching Liu Yang make holes all day long, he was full of anger, and said: "When the city wall collapses, when the troops will be able to pull it up." He Guangxiu was also high-spirited, he fought the Yuan Army before, he performed well, and was praised by Deng She himself, and rushed to say: "The villain is willing to be a pioneer." ”

Yang Wanhu glanced at him, the two of them have been partners for a while, although they still look down on it, the relationship is closer after all, endure the mocking words, and snort.

There is a bit of strife and discord among the subordinates, as long as it is not excessive, it is a good thing. To put it mildly, it is called balance; To put it bigger, it's a power technique. As soon as a person arrives at that position, many things are self-taught, Deng She smiled slightly, saw it when he didn't see it, muttered for a moment, and said: "Make preparations first, tonight's three watches, break the city, attack the city." ”

He summoned the herald: "Tell Zhao Guo to continue the feint; Prepare the new army, listen to the sound of our cannons, and storm the northern city wall of Gaizhou together, attract and disperse the forces of the Tartars, and cooperate with our troops to fight. ”

Everything is ready, only the east wind is owed.

Blowing up the city wall is not a tunnel dug under the city, just burying explosives. The axis of the tunnel must be deviated from the axis of the city wall, the foundation of the wall must be hollowed out, and the wooden pillars will be supported. If there is no explosives, you can fill it with firewood and grass, pour grease, and then ignite it, and wait for the supporting wooden pillars to burn out, and the city wall will naturally topple over; If there is explosives, it is much simpler, instead of firewood, grass and grease, a fuse is pulled, and the soldiers withdraw from the tunnel, and then ignited.

As soon as the dynamite exploded, the walls fell.

If there is only one tunnel, the gap in the collapse of the city wall is relatively small; In order to be stable, Liu Yang dug two, so that there would be a chain reaction, and the gap would be relatively large.

Dunsher used this tactic for the first time, and so far, everything has gone well. It was so smooth that he couldn't imagine it, the night gradually deepened, the clouds were thick, and he couldn't see his fingers. Yang Wanhu and He Guangxiu selected 2,000 cavalry and 3,000 foot soldiers, and in the middle of the camp, the cold wind blew the red flag, and Deng She inspected in front of them.

Most of these people have been in the army since Yongping, and they have followed Deng She to this day. Deng She looked back in the direction of the twin cities, and in the dark night, he could not see anything; He turned to Haizhou again, and the faintly lit lights were the palace army left by Mao Jujing.

He rode on his horse, his horse's hooves rattled, and the five thousand men were silent. Bi Qianniu lit a torch and followed behind Deng She; One by one, eyes focused on their general.

Deng She didn't say anything, for fear of alarming Gaizhou; He saw the selected dozen or so personal soldiers, led by Liu Yang, carefully touching the gunpowder, one by one into the tunnel, and the figure disappeared into the ground. After a while, the officer in charge of watching the hour trotted over and whispered, "General, it's going to be the third watch." ”

The soldiers who went down into the tunnels have not yet come out. The lights of Gaizhou in the distance were blazing, and the soldiers of the Yuan army patrolling the night fired the three watches. Liu Yang showed his head, sweating profusely, and it was all plaster. One by one, the soldiers crawled out, and two thick leads were drawn out behind them.

Liu Yang looked at Deng She; Dunshe nodded.

The fuse ignited, crackled and burned, bursting out of sparks, like two fiery snakes, quickly sinking deep into the ground. Except for a little smoke at the beginning, it soon disappeared. After a long time, it seems to be only a moment. It was cold, and Dunshe's palms were sweating, and it was the first time he had used such a tactic.

Yes? Not?

It is like fireworks in the sky, and it is like a sleeping dragon in the ground waking up. An earth-shattering explosion shook the earth's surface. Deng She raised his eyebrows, his sword unsheathed, and despite the long hissing of his frightened mount, he exclaimed, "Seven months ago, I took you out of Yongping; Today, I'm bringing you back to Liaodong! ”

"Shoot!"

Three cannons rang out, and the feint attack in the north of the city turned into a real attack. Gaizhou City was in a panic, the collapsed city wall was almost more than ten zhang, the aftershocks did not stop, the dust was all over the sky, the injured Yuan soldiers screamed again and again, the officers desperately pressed it, and there were still a large number of soldiers fleeing backwards.

The door of the army in the red scarf opened, and Deng She's saber pointed: "Kill!" ”

The cavalry is in front, the foot is behind, whether riding or foot, everyone carries a bag of dirt. In addition to the main force of 5,000 people, there are also 3,000 people who are temporarily transferred. Miles away, in the blink of an eye, 8,000 bags of dirt, less than a third of which were lost, filled a wide enough section of the moat.

Until this time, the Yuan army had not reacted, and the artillery, trebuchet and other objects were broken into the city by the red scarf without firing a single bullet.

The cavalry rushed forward, the foot soldiers expanded the victory through the gap, climbed the city wall, and occupied it one by one, and the battle flag of the red turban was quickly erected. The ditch in the city was not as deep or as wide as the moat outside the city, and the two thousand bags of the cavalry were dropped and filled up at once.

With Zhao Guo's onslaught on the northern city wall, the Yuan army was unable to send reinforcements to the southern city wall, and fell into a two-front battle, dwarfed by each other.

After receiving Deng She's orders, not long after the battle, the cavalry who broke into the city and were about to fall into a street battle suddenly shouted in unison: "Gao Jianu has run away!" Gao Jianu ran away! "The city wall collapsed, the main general ran again, and the Yuan army in Gaizhou was already corrupted in military discipline, less than two hours, and then the main force of foot soldiers who poured into the city has occupied key positions such as the marshal's mansion, warehouses, and official offices at all levels.

After Deng She entered the city, he adopted the tactics of infiltration and division, and used a small group of elites to break through the enemy's defensive line, which made the Yuan army fall into a situation where the Yuan army was in a situation where one was lost and the other was lost, and the orders of the upper and lower armies were not smooth. A large number of Yuan troops began to surrender; A small number of diehards who fought to the death had tiger generals like Yang Wanhu to crush them.

At this point, before the dawn came, the war in Gaizhou, so to speak, had come to an end.

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1. Tunnel warfare.

Also known as tunnel warfare, China is the birthplace of this tactic, and the historical facts of the tunnel are rich, and it is known as the world's crown. During the Warring States period, the vassal states widely used tunnel tactics to capture fortified cities, and at the same time planned various measures to prevent tunnel damage, including anti-tunnel tactics.

The nine attacks and nine rejections with Mozi are a sand table offensive and defensive combat exercise; In the ninth round, Lu Ban used the tunnel tactic, digging a tunnel from the ground to attack the city, but was thwarted by Mozi with the method of "preparing the hole". "Preparing the hole" is the tactic of anti-tunneling.

2. Tunnel excavation, tunnel siege, and tunnel hand-to-hand combat.

"The method of piercing the hole, if the well is dug at the beginning, it is three feet deep, that is, it is pierced. …… All the earth in the cave comes out of the first well,...... When it penetrates the airway obliquely for more than half a mile, it is called the whistle eye. ”

In 423, in the Battle of the Tiger Prison of the Wei and Song Dynasties, the Song general Mao Zude led his troops to dig six tunnels, organized a commando team of 400 people, and attacked the back of the besieging Wei army through the tunnels, defeating the Wei army. This group of tunnels, covering more than 17 meters, and from the city to the enemy's rear, the project is very huge.

In the Five Dynasties, the armies of the Later Liang and Later Jin launched a rare tunnel war in Zezhou. The Liang army defended Zezhou, and the Jin army dug tunnels in an attempt to attack the city, and the Liang army selected dozens of warriors to dig tunnels to fight, and the two sides engaged in hand-to-hand combat in the tunnels. "After thirteen days, the Jin army suffered many casualties."