After a sigh, Ma Xingrui ordered his subordinates to pay attention to the vigilance at all times, since the thieves are already here, the battle to attack the city and seize the pass is about to start.

The generals didn't dare to slack off, they were all ready, especially the soldiers who were in charge of staring at the thief battalion opposite, they didn't even dare to blink their eyes, for fear that if they blinked, the thieves on the opposite side would kill them.

There's no way, who called the thief too famous, this is not staring at it desperately, and his heart is not steady!

In the evening, Wanhua's Chinese army tent, Wanhua was listening to Zhang Xilao's plan to dig tunnels with Xu Jie, Guozhen, Lin Hu, Lin Bao, and Wang Er.

Zhang Xilao's report was generally formulated in accordance with Wanhua's requirements, because this was the first time he had done this kind of thing, and he had no experience, so he basically didn't change anything, but just copied it.

After listening to Zhang Xilao's words, Wanhua also thought of a few things that needed to be improved.

I only heard Wanhua say to Zhang Xilao: "The first point is to change the distance of excavation from the current ten miles to five miles, the distance is too far, and the ventilation of the tunnel is not smooth, so it is very likely that an accident will occur!"

The second point is to pile up a mound in front of the tunnel entrance, so that it can be used as cover, even if the cannon is fired on the Tongguan, or suddenly send troops out to attack the tunnel entrance, it is not a big problem. ”

After speaking, Wan Hua just glanced at everyone, and said to them again: "Do you have anything to add?" ”

Everyone naturally has nothing to add, after all, they have not said that they have done this thing of digging tunnels with gunpowder to blow up the city gate, and they have never even heard of it, even if they want to supplement it, they can't supplement it!

Seeing them like this, Wan Hua said: "This is also the first time we have done this method, if you think of anything, you can put it forward at any time and fill in the gaps." ”

After speaking, Wan Hua said to Zhang Xilao: "Okay, you just do it, and pile up the mound first tonight." ”

"Yes, Master Tiger."

After Zhang Xilao left, Wanhua made some arrangements again, especially solemnly explained to Liu Tian: "It takes a lot of time to dig the tunnel this time, in order to guard against the cannons on the head of Tongguan City, you must keep an eye on them at all times, once they want to open fire, you must immediately warn in advance!" ”

Liu Tian also knew that the matter was very important, and he didn't dare to slack off, so he solemnly took the order and went down to explain.

At night, Zhang Xilao and they took advantage of the night to carefully pile up, and a mound slowly rose from the ground, and when the soldiers on the head of Tongguan City found it, the mound was already quite large.

The soldiers were startled, and they ran to report Ma Xingrui in a panic.

Ma Xingrui was shocked when he heard this, and hurriedly went to check.

"General, the thieves are going to attack from the cave!"

Ma Baoshan on the side said to Ma Xingrui.

Cave attack is to dig tunnels to sneak into the city and transport soldiers through tunnels to attack inside.

Or dig the tunnel to the side of the city wall, and then continue to dig deeper, and when the wall base is dug, some wooden piles will be transported into the tunnel, and then slowly hollow out the soil under the wall foundation, and use wooden stakes instead of soil to support the wall foundation.

After hollowing out the foundation of a section of the city wall, and then withdrawing people and putting a fire, you can slowly burn the wooden piles inside, and as soon as the wooden piles are burned, the wall foundation of that section will lose its support and will collapse, which is a cave attack!

Looking at the higher and higher mounds, Ma Xingrui was in a hurry, if the thieves succeeded, wouldn't Tongguan be broken!

But what to do?

It is obviously too early to order someone to listen to the corner of the wall and judge the location of the thief's tunnel.

Send people out to attack the tunnel mouth, that is also unrealistic, you must know that the greatest effect of Tongguan is reflected in the defense, once out of the city, it is very likely to be surrounded and annihilated by the thieves, you must know that the combat effectiveness of the thieves is not blown, and they have not suffered defeat until now!

Ma Xingrui didn't think that the soldiers in his hands could compete with the thieves in the field, the soldiers had long been accustomed to defending at the head of the city, if they lost the dangerous pass of Tongguan as a support, it is estimated that the soldiers would not fight!

Then there will be only a cannon to bombard!

"Come on, fire! Hit them hard! ”

Ma Xingrui immediately gave the order to open fire.

The soldier in charge of firing the cannon was given the order and immediately loaded his ammunition and prepared to fire.

At this moment, the sound of "woo" horns sounded everywhere, and it sounded as if it was everywhere.

This was arranged by Liu Tian to blow at night, they were lying in ambush on the steep peak and dangerous wall, and they were always monitoring the movements on the head of Tongguan City, in order to warn.

Because the torches at the head of the city are bright, it is not difficult to observe their movements.

Zhang Xilao heard the sound of the horn and knew that the officers and soldiers were about to open fire, so he hurriedly shouted loudly: "Hurry up and hide behind the mound, quickly!" ”

Hundreds of workshop masters who were still busy with their shovels and quickly hid behind the mound.

Fortunately, the mound was big enough and high enough, as if it were a small mountain, and it was enough to provide cover at night.

Ma Xingrui heard the sound of horns all over the place, and knew that it was the thief who was reporting the news, he didn't expect the thief to be so cunning, and his every move was under the surveillance of the thief, which made him very annoyed!

"General, can this cannon still be fired?"

"Hit! Beat me to death! ”

Ma Xingrui was annoyed and ashamed, and shouted in his mouth that he ordered the soldiers operating the cannon to open the cannon immediately, and open the cannon a lot, his whole body was so angry that he was about to explode, if he didn't open the cannon again, he would really be unable to open the city gate and fight the thieves in a decisive battle!

With a loud bang, a cannonball just hit out, with boundless momentum, and the cannonball finally fell from top to bottom, with a slight slash, that is, it fell on the mound, and suddenly there was no shadow.

This black light is blinding, and I don't know where it is, but I didn't hear the screams, and I thought it was missed, Ma Xingrui ordered again: "Look at the angle of Ben General, let the shells pass through the mound, and hit the thieves hiding behind!" ”

This is difficult for the soldiers who operate the artillery, even if they hit a lot of cannons, but most of them are also closed eyes, where the more people hit in which direction, where the end falls, then only God knows,

Although I fought a lot, I knew a little bit of the law, but I didn't have a long perspective eye, this black pitch was so dark, and the ghost knew which Gadari those thieves were hiding in the mound,

Besides, don't look at the mound's size, but whether you can hit the mound or not is still two words, let alone any angle!