There were many musketeers on the side of Yu's army, coupled with the breastwork, the rejection of horses and the trench as a cover, completely ignoring the charge of the Jiannu cavalry, giving full play to the advantage of the three-stage attack, and the rows of musketeers took turns to step forward and fire behind the breastwork.

As a result, the first charge of 2,000 Jiannu cavalry lasted less than two quarters of an hour, and then it collapsed, discarding more than 300 wounded and corpses in front of the battle, as well as many dead and wounded horses, and the remaining Jiannu cavalry fled back in ashes.

Du Du was a little dumbfounded, he didn't expect that an army would have such strong firepower, this Yu family army would be so powerful, and the muskets and cannons would be so sharp.

The 2,000 Mongol and Eight Banner cavalry rushed over and came down one by one, and were cut down by others as if they were cutting rice, and they didn't even touch the enemy's defensive line, and even more so their cavalry couldn't even shoot an arrow, so they were beaten back.

So he hurriedly adjusted his tactics, gave up the method of letting the cavalry charge, and instead ordered the infantry armor to fight, and this time he directly transferred the 4,000 infantry army to fight.

Among the 4,000 infantry troops, about 2,000 people, are the banner of the Han army, all of which are composed of the Ming army that surrendered before or the young and strong Han people who were captured and plundered out of the pass.

The other 1,000 people were the armor-clad men of the Eight Banners of Jiannu, who were their main force, and the remaining 1,000 people were infantry drawn from the Eight Banners of Mongolia.

These 4,000 infantry were equipped with a lot of shields, raised their shields in array, and after screaming wildly, under the leadership of several Jiannu generals, spears were like forests, and shields like walls began to push towards the defense line of the Yu family army.

Seeing that Du Du was replaced by Jiannu, Yu Zhenshan sat in the army, his face did not change, and he still responded to all changes with the same, and ordered the enemy to enter the firing range, so he first used artillery bombardment, and then continued to shoot with a platoon.

There is nothing new in this kind of battle, and the Yu family army has fought too many battles like this, and many enemies have been stunned in the face of this tactic of the family army, just because they are completely unaware of the ability of the Yu family army to output firepower.

It seems that there is nothing wrong with Du Du doing this, but if he wants to break through the defense line of the Yu family army in this way, it is simply a dream, which is almost like sending him to death.

Yu Jiajun is now a standard platoon gun to shoot party members, and what he likes most is that the enemy uses this method to fight them head-on, so when the platoon shoots them, it can't be more pleasant.

Therefore, not long after these Jiannu infantry went into battle, they were immediately subjected to fierce shelling by the Seawolf artillery, even if the Seawolf artillery used solid bullets, in this cold and freezing environment, the ground was frozen solid, which was suitable for exerting the power of solid bullet ricochet killing.

One by one, the cannonballs flew into the array of the Jiannu army, and each shell landed, even if a bloody alley could be opened in the Jiannu formation, anyone who blocked the passage of the cannonballs could only become victims.

In front of these shells, the shield armor was like paper paste, which could not play any protective role, and many Jiannu soldiers were torn off by the shells, and some were even shredded on the spot, and their internal organs and limbs flew around in the crowd, and blood and flesh were everywhere.

The funny thing is that Du Du actually let his subordinates discharge such a dense formation, which happened to become a live target for the artillery of the Yu family's army, and the artillerymen could be regarded as refreshing, and on a cold day, after a while, their heads were steaming and sweating.

Jiannu's soldiers were beaten in fear, but the discipline of the Eight Banners was strict, and they did not dare to collapse on the spot, so they could only evacuate the formation a little bit to minimize the damage to them caused by such shells.

When they entered the distance of 200 meters, the infantry musketeers of the Yu family army began to fire again, and rows of musketeers stepped forward and began to shoot in rows, as if they were shooting live targets, cutting the rows of Jiannu soldiers to the ground like mowing grass.

Jiannu's soldiers and generals are so aggrieved! Are they also elite soldiers? When have you ever been bullied like this? Seeing that the enemy formation was in front of him, he was stunned and couldn't attack it, so he could only be beaten up.

Jiannu is also a human being, don't look at the usual arrogance of the Ming Dynasty officials and soldiers, but when they encounter the position of the Yu family's army, they can only eat deflated.

Of course, there is no need to say much about the result, Jiannu's offensive was beaten by the Yu family's army, and before they could attack the front of the Yu family's army's defense line, they were completely defeated and fled back.

Du Du was numb this time, he realized that today is a real hard stubble, this kind of fighting, he has never seen before, the sharpness of the firearms in the hands of Yu Jiajun is far beyond his understanding of the bird gun musket, two hundred steps away to take people's lives is like picking up things, even if they are wearing heavy armor, they can still be knocked to the ground.

Du Du saw that the offensive he launched was so unbearable in front of the family army, and he was a little scared, but if he didn't fight, it would definitely not work, and now they had no choice but to make a passage from here and rush out of the pass, if they were blocked here, once the Ming court came back and realized that this was a golden opportunity, and mobilized heavy troops to surround them, then their 100,000 army, I am afraid that this time they will be lost here.

What these soldiers and horses mean to their Jiannu, Du Du knows better than anyone else as Baylor, once they are wiped out here, then it means that the Great Qing Kingdom they have built with great difficulty may only be destroyed in an instant.

So when Du Du thought of this, he was scared into a cold sweat, and immediately ordered to quickly gather his subordinates to find a way, and after a while, the Manchurian generals, Mongolian generals and Han generals he brought were all summoned to Du Du, and Du Du asked these people for advice.

These guys are also a little numb at this time, no one has ever encountered such a way of fighting, no one has ever encountered such a strong firepower army, discussed for a while, some Jiannu generals and Mongolian generals proposed that the Han soldiers are the best at foot combat, and this matter must be done by the Han soldiers.

And as soon as those Han generals heard this, they immediately pressed the old mothers of these Jiannu and Mongolian generals to the ground in their stomachs, and turned the rice a hundred times. If Lao Tzu is good at foot combat, can you be caught and used as a dog's leg for you?

But these words can only be scolded in their hearts, and they don't dare to scold them in person, although they are reluctant, but there is no way, so they can only agree to it.

Since the matter has come to this point, if you go, you will die, and if you don't go, you will die, and they can only fight.

So these Han generals who built slaves got together and discussed for a while, but they really couldn't come up with a good way, so they could only use the old way.

They sent people to quickly collect logs and vehicles, and quickly put together some oars or carts on the spot, and put these shields or carts in front, so that even if they could not stop the shells, they could at least block the shells.

Du Du led the people to toss for half a day and a night's work, even Ming Ming all night to build all kinds of turrets, shields, carts and other things, during the night, in order to exhaust the enemy, they also sent a small force of cavalry to attack the defense line of the Yujia army.

In order to prevent the Jiannu army from attacking at night, the Yu family army lit a bonfire at a distance of about 150 steps outside the defense line, a few dozen steps apart, and as long as the Jiannu appeared outside their line at night, they immediately fired a volley of guns to repel it.

After a night of hard work, Jiannu put out two or three hundred pairs of oared shields or oared carts from the camp at dawn and placed them in front of the two armies, and sent thousands of Han troops to attack the defense line of the Yujia army under the cover of the turrets.

After a day of fierce fighting, Yu Zhenshan still led his troops to repel Jiannu's offensive, and the front of the two armies was full of piles of scattered wreckage of carts or shields.

Dealing with these turrets and shields has long become the forte of the Yu family's army, the artillery can directly aim at them, the infantry uses wolf's tooth rifles, within 100 meters, they can also penetrate, even if the lungs are pushed to the front of the Yu family's army's line, as long as they enter a distance of thirty steps, the Yu family's army still has grenades to deal with them.

Therefore, these carts and shields don't play much role in the Yu family army at all, but they can make Jiannu's soldiers and generals get closer to the defense line of the Yu family army!

At the end of this day, Jiannu left more than 1,000 corpses and wounded in front of the Yu family's army, in addition to these, their biggest gain was to put a few rows of arrows towards the defense line of the Yu family's army, which caused some pressure on the Yu family's soldiers.

Du Du looked at such a battle situation, his head was smoking, he gritted his teeth and swore to kill all these damned Yu Jiajun, but this oath was just that, he was made by Yu Jiajun to have no temper at all.

The Yu family army has obviously been waiting for them here for a long time, although the defense line built up is not strong, but it effectively restrains the cavalry offensive that Jiannu is best at, and the Yu family army relies on this simple defense line, with their sharp firearms, like a fire-breathing hedgehog, so that Jiannu, the vicious dog, is in a hurry and can't speak.

Du Du saw that the day could not be achieved, so he turned to the idea of the night, night is a natural protection for Jiannu, even if the Yujia army is outside the defense line, a bonfire is lit, but the line of sight can not be far, which is relatively beneficial to Jiannu.

So Du Du gathered thousands of soldiers and horses that night to launch a high-intensity and large-scale night attack on the defense line of the 7th Brigade of the Home Army.

In the middle of the night, the Jiannu army quietly first touched the line of sight of the seventh brigade to assemble, and then suddenly shouted loudly, and thousands of soldiers and horses immediately rushed from the darkness to the defense line of the Yujia army like a tide.