At the head of Ningwu Pass, Qin Chuan saw some people with iron picks and iron drills in the Jiannu array from the telescope, and he knew what Huang Taiji wanted to do.

Cut the ground from under somebody's feet.

Some people like to use this method when attacking the city, such as Li Hongji, who likes to dig the foot of the wall when attacking the city, digging under the city wall like a hornet's nest, and then tying the column with a thick rope, so that tens of thousands of rogues can pull the column alive, and then the city wall collapses.

Huang Taiji should have wanted to dig up the two turrets, let his people break in and occupy the turrets, seize the firearms inside, and then attack the city wall through the overpass of the turrets.

The idea was good, but he didn't know that there was such a thing as reinforced concrete, or that it was harder than stone.

"When the other side comes into range, you can fire freely."

Qin Chuan put down the binoculars and explained to the artilleryman next to him.

"Yes."

The order was quickly passed down.

When Jiannu entered the distance of two miles, the twenty-two red-clothed general's cannons also opened fire in unison, and the shells covering the Jiannu formation became dense.

Jiannu's stragglers could not avoid casualties, but could only avoid being ploughed out by artillery shells.

Moreover, the ordinary big shield and shield car can't stop the shells of the Tianwei General Cannon and the Redcoat General Cannon at all, especially after entering the two-mile range, the cannonball of the Tianwei General Cannon, which is bigger than a fist, can easily shatter the wooden planks with a thickness of less than three inches.

Before they could enter a mile away, three shield carts were smashed on all sides, and after a few powerful shells smashed through the baffle, they still penetrated into the dense crowd of Jiannu behind them, and ploughed out bloody paths.

But these Jiannu did not flinch, and under the shouts and encouragement of many generals, they still slowly pushed forward.

After Jiannu was in the back formation, Huang Taiji kept frowning, and his eyes were fixed on the artillery that spewed out tongues of fire from time to time at the head of the city.

The surnamed Qin had more artillery than he expected, and they were all powerful Hongyi cannons.

I don't know how these guns were made.

If you give him a few years of development, when he has hundreds or even hundreds of cannons, I am afraid that he will really not be able to help him.

"Let the warriors stretch the line, accelerate the speed, and be sure to take those two enemy platforms before dark."

"Wow."

After Huang Taiji's order was passed down, the ten Niu Lu 2,500 soldiers and the 500 Wuzhen Chao Ha soldiers continued to stretch the battle line and accelerated the speed of advancement.

The purpose of lengthening the battle line is to reduce the depth damage caused by the opponent's artillery.

However, the elongation of the battle line and the stragglers also made the minefields they covered larger and wider.

In other words, their chances of stepping on a thunderbolt will increase dramatically.

Outside the northern city wall of Ningwu Pass, except for the straight road directly in front of the city gate, there are explosive cannons, that is, mines.

There are 300 in total, and they are irregularly distributed in an area of one mile in length and width outside the city wall.

After speeding up the advance, Jiannu quickly entered the minefield, and stepped sideways in a straight line.

The fastest was a shield cart covering a dozen dead soldiers, and it rushed towards the enemy platform on the left, and they were going to dig the corner of the enemy platform.

A dead soldier on a cart felt like he had stepped on something strange, like a small plank, and the sound of clicking came from under his feet, followed by the sound of gunpowder.

The dead soldier subconsciously looked at his feet.

Then, he saw the dirt under his feet suddenly explode.

There was a loud "boom", and before the dead soldier could react, the whole person flew into the sky in pieces.

A dozen dead soldiers beside him were either swept away alive or beaten into a sieve by the iron beads that shot from all directions, and they collapsed to the ground after a shudder.

More than a dozen dead soldiers, none of them were spared.

The shield cart was also blown apart,

"What's going on?"

Huang Taiji frowned, looking at the direction of the explosion in disbelief.

"Returning to the Great Khan ......"

As soon as a general next to him spoke, there was a sudden loud bang in front of him.

Before the sound passed, there was suddenly another loud bang at the other end of the line, and then the entire front rumbled like a sudden lightning strike.

Accompanied by the roar, there were also the wreckage of severed fingers that had been blown up and thrown in all directions, and the screams and cries were terrible.

The entire Jiannu long formation, as if it had been baptized by a catastrophe, was blown to pieces, and there were corpses and wounded soldiers screaming and rolling everywhere, like hell on earth.

"Bomb cannon, it's a bomb cannon!"

Wu Zhenchao's Niu Lu Zhangjing Wang Shixuan was the first to recognize what it was.

Huang Taiji, who was already pale, hurriedly raised his voice and shouted: "Retreat, retreat!" Let the warriors all come back, quick! ”

In fact, there is no need for him to shout, those surviving Jiannu will also run back by themselves, and the sudden explosion from the ground will blow up their souls, and they will only rely on instinct to flee backwards, trying to escape a way out.

In the process of escaping, several more explosives were detonated, leaving a group of scattered and fleeing Jiannu in place.

There were 2,500 soldiers, 500 Wuzhen Chaoha, a total of 3,000 troops, and only about 1,000 people finally escaped.

The remaining 2,000 were either killed or wounded, and all remained on the battlefield.

Bursts of cheers suddenly rang out at the head of Ningwu Pass, and after the Guan Emperor army defending the city recovered from the initial shock, they erupted into thunderous cheers.

Most of them saw the power of the bombers for the first time, but they didn't expect those fierce Jiannu to be blown to pieces.

Even Qin Chuan himself was surprised, the explosion of a mine might be nothing, and when dozens of mines exploded like firecrackers, the scene even shocked him.

It was a mine filled with four catties of black powder, even if the power of black powder was limited, but such a large dose of explosion was not small at all.

You can get more of this stuff to play with in the future.

"Big boss, if Jiannu drives the people to step on the bombers, what should we do?"

When he was excited, Li Dingliang on the side suddenly came over and asked in a low voice in Qin Chuan's ear.

Qin Chuan was taken aback, and the expression on his face instantly froze.

He was just thinking about how to blow up Jiannu, why didn't he think of this problem?

Luo Daniu also mentioned that when they finished attacking Yan Yechen's department, the other party had pulled thousands of people out to attack their military formation.

It seems that Jiannu has done such a miserable thing.

"Where did Jiannu put those people?" After coming back to his senses, Qin Chuan asked subconsciously.

"In Yangfangkou, the money and grain, cattle, sheep, mules and horses that Jiannu stole are also there, according to the news from Zhao Wu, there are only about 2,000 Jiannu guarding there."

"Can Liao Sangun get by?"

"I can't get through, there is only one way to Yangfangkou, and now that area is full of Jiannu's exploration horses, not to mention more than a thousand cavalry, even if Zhao Wu doesn't collect it at night, he can't get by."

Qin Chuan frowned and looked fixedly at the Imperial Taiji army formation outside the city.

"Go and prepare some iron-clad shields, to be thicker, it's not early now, wait for Jiannu to go to Yangfangkou to escort the people over, it's getting dark, then send troops out to clear mines and dig up those explosives."

"But...... Big boss, this is too dangerous, isn't it? ”

"Let's give it a try, if it doesn't work, forget it."

"Okay."

……

In the Jiannu army, after hearing the casualty figures reported by his subordinates, Huang Taiji's face became more and more ugly.

Of the 2,500 soldiers, less than 900 fled, 500 Wuzhen Chaoha, and less than 300 came back alive.

He has been fighting horses all his life, and he has never fought such a battle, and he has not even touched the other party's hair, so he has suffered such heavy casualties.

"Humph! Qin Chuan, since you dare to use such a vicious firearm, don't blame Ben Khan for not paying attention to benevolence and righteousness. ”

"Come on, go to Yangfangkou and take 10,000 Han prisoners over."

"Wow."