I was engaged in infrastructure construction in the Han Dynasty [Transmigration Book]

Liu Tan looked at the shocked expressions on everyone's faces, and said, "It's not a special method, but it's just to use the gunpowder barrel in a different way."

Everyone was a little at a loss, another way?

Since the appearance of the gunpowder barrel, the only known method of use seems to be throwing.

After throwing it out, it causes a large-scale explosive attack, and then one's own side only needs to clean up the battlefield, basically there is no need to do anything else.

It's just that now that Liu Tan said that there are other ways, it really makes them interested.

Liu Tan waved his hand and asked someone to bring the map of Shanggu County. He clicked and said: "Now Shanggu County is occupied by the Xiongnu. It will definitely consume a lot of manpower and material resources if we attack the city from the outside. The effect is not necessarily good, so I decided to Use a gunpowder barrel to blast a passage from the ground, then sneak into the interior of Shanggu County, and start a sneak attack directly from the inside. Presumably the Huns will never think that we can drill out of the ground. There are many things we can do when they are not prepared. .”

Everyone stared at Liu Tan dumbfounded, and Miao Rui couldn't help asking: "Your Highness, can powder kegs really blow up tunnels underground?"

Liu Tan nodded: "Yes."

Someone asked bluntly, "Then why didn't His Highness use this method when we attacked Liaodong County?"

Liu Tan: ...

Where did the brat come from? Which pot does not open and which pot to lift? When he thinks of special methods, it is when he is on the scene. That is to say, only when he comes into contact with these things can he think of it. If he doesn’t know anything Contact has been staying in Weiyang Palace from the beginning to the end, it is estimated that he is just a rich man now.

But facing everyone's admiring eyes, Liu Tan couldn't admit that he hadn't thought of it before, so he said very calmly: "The main reason is that this matter requires relatively high technical content. In fact, I just found a saying that everyone can understand. When I actually do it, I need to configure black powder on the spot, bury it according to the required amount, and detonate it. It's not good if it explodes, and it can't be too little, too little can't let the black powder exert its power."

Seeing that everyone seems to understand, Liu Tan thought for a while and said: "Actually, black powder is not needed for the whole process. Black powder is only needed when encountering rocks or places that are very difficult to dig. Usually, other places also need help. It needs to be excavated by hand."

It sounds like there are not many places where black powder needs to be used, but in fact, if there is no black powder, the method of digging a hole directly into the city is basically unusable, because how to dig out the rock layer?Relying on the ancient technology now, either use human power to chisel the rocks, or use hot water to use the principle of thermal expansion and cold contraction to crack the rocks.

Either of these two methods takes time.

In order not to let the opponent notice, Liu Tan also planned to let the soldiers perform feint attacks from time to time, and then retreat as if they were unable to attack.

The casualties should not be large in a short period of time, but after a long time, that casualty is something he doesn't want to see, and the most important thing is that it doesn't match his personality if he spends so much time without making up his mind to directly attack. People are suspicious.

Of course, the most important thing is that it is not so easy to dig a tunnel, because there are groundwater sources or other reasons, the direction of digging the tunnel, and the trend of the tunnel need to be determined bit by bit.

Liu Tan has such talents under his command, so he wants to discuss with everyone more in this meeting.

Determine the direction of tunnel excavation from the perspective of strategy, tactics and geographical location.

This is the first time that everyone has used this method to attack a city, or it can't be called a city attack. If this method is not their own city, it is no different from going directly to someone else's house to rob.

But everyone didn't think there was anything wrong. Anyway, as long as you can win, sometimes everyone doesn't particularly care about the means.

What's more, Liu Tan's method is already very gentle, and it can be regarded as the one with the least casualties among all methods.

After many surveys, several places were selected, and the excavation could begin after Liu Tan made a final decision on a place.

Liu Tan clicked on the map, and was about to choose a place he was looking forward to, but before he could speak, he suddenly paused, turned his head and said, "Well, everyone votes for a place, and the one with the most votes will be directly selected. come down."

Someone asked blankly: "It's fine if your Highness decides directly."

Liu Tan shyly smiled and said, "This... I still don't want to play tricks. After all, I seldom lead soldiers to fight, and my judgment on these things is not very accurate. What's more, these places are originally the brainstorming of everyone, and now they will be settled together. It's pretty good too."

After hearing this, everyone felt very comfortable. They were originally generals of the Northern Kingdom, and they had no dissatisfaction with Liu Tan. They were already prepared, and they would listen to whatever the Northern King said.

Anyway, judging from various deeds, the decisions made by His Royal Highness the King of the Northern Realm are generally not wrong, but those who do not obey his orders are miserable.

Seeing that everyone started voting with great interest, Liu Tan couldn't help but sweat in his heart.

He actually had a favorite place, but before he decided on that place, he suddenly thought of his inexplicable passive skill, and suddenly stopped.

He didn't want to suddenly dig out a piece of mine while digging the tunnel. It's not a good omen at this time, is it?

If there is a mine in that place, it proves that that part of the place is unusable, and the places they chose are actually in that part, and they will have to re-select another place when the time comes, the point is that a lot of time is wasted.

After everyone's votes came up, a place was finally selected based on everyone's opinions.

Liu Tan thought to himself after sending people over to start tentative construction: This time there will be no more mines, right?

Anyway, even if the mine is dug out, it is not his problem.

Fortunately, there were indeed no more problems this time. After confirming that there were only soil and rocks underground, he was relieved.

Liu Tan was staring at the excavation of the tunnel while letting people pretend to attack Shanggucheng, and was also anxiously communicating with Jicheng. He had to ensure Liu Ku's safety now.

It’s just that because Shanggu County is the only road leading to Yan Kingdom, after being blocked, he can only rely on carrier pigeons to send messages there. Dozens of pigeons fly over and don’t know how many pigeons will reach their destination in the end. And even if they arrived at the destination, Dou Sibo and the others had to send the news to Shuofang City by flying pigeons, and then Huo Guang would send it to him.

There is no way, the pigeons that can communicate with him in the country of Yan are all brought by him from Shuofang City, and the pigeons are used to send letters by using pigeons to identify their homes.

That is to say, this letter exchange is basically a semi-fixed point, at least the place to receive the pigeons is fixed, and they cannot be taken away artificially.

So it is not smart enough to say that Feige is good at everything.

Now it's useless even if Liu Tan is anxious, he can only take down Shanggu County first, and then look at the situation.

The excavation of the tunnel was very smooth. Although the use of black powder was somewhat dangerous and often hurt people, it was not life-threatening.

And during this period of time, after the Xiongnu discovered that every attack by His Royal Highness the King of the North would return in vain, their fear of the King of the North had dropped to a minimum, and they even learned to use Chinese to laugh at Liu Tan.

What he said is not worthy of his name, he was lying before, anyway, he came here no matter how he was angered.

Liu Tan was still patient at first, and then occasionally went out to show his face when he felt that the heat was about to come, so that the other party could see his anger and powerlessness.

After returning to the middle tent, he regained his composure.

Miao Rui and Bi Gao, who followed Liu Tan, deeply felt that His Royal Highness had been greatly wronged, and couldn't help but said: "Your Highness, the tunnel has been dug, and we can send people to sneak in in a few days, how about now?" Let's start the siege."

Liu Tan said while eating slowly: "You all said that the digging is almost done. If you can't hold your breath now, it will be a failure. I'm not angry. Why are you angry? You are getting old, so be calm."

"My lord, they...they are too much!"

Liu Tan smiled slightly: "How happy they are now, they will be astonished later. Let them be happy now. It doesn't matter. Anyway, the one who laughs last is the one who laughs the best."

It was just a few words of scolding, it didn't hurt, the other party didn't even dare to scold his whole family—probably because he was afraid of scolding too much, so he let Liu Che find an opportunity to go directly to the army.

In fact, if it wasn't for the purpose of paralyzing the other party, how could Liu Tan cooperate with acting?

The happier the other party is now, the more he thinks that he is incompetent, the more relaxed he will be, and the easier it will be to succeed when the time comes.

No matter how smoothly the tunnel is dug, it cannot offset one thing, that is, there cannot be too many people passing by at one time, the tunnel cannot be dug too wide, and time does not allow it. In fact, it is also very dangerous, so Liu Tan can only do his best to let the other party Be less on guard against them, and it will be a while later if you find out, especially when the tunnel is dug into the city, you need to use black powder, so you can't arouse the other party's suspicion.

After arriving in the city, the tunnel will be divided into several passages leading to different places. The first thing to control is the armory, and then the county guard's mansion.

There are a few other bits and pieces left, which were all determined by Liu Tan based on the previous distribution of Shanggu City, and I don't know if it will be useful.

When Liu Tan was thinking about this, Bi Gao walked in and said, "Your Highness, everything is ready."

Liu Tan took a deep breath, a little nervous, but still kept calm, and said with a slight smile: "Tonight at midnight."

Bi Gao took the order to go down, and after all the people in the tent had left, Liu Tan let out a nervous sigh.

He didn't know if this method was possible, but the arrow had to be launched, not to mention, it was also an impossible method.

Liu Tan imagined what it would be like for those vanguard troops to sneak into Shanggu City, and even imagined that those people might be discovered as soon as they showed up, and then used their lives to buy time for their comrades in arms.

A lot of already blurry movie clips flashed through his mind.

It's just that he thought of many possibilities, but he didn't expect that what was supposed to be an exciting war movie turned into a funny movie by his subordinates.