After the soldier saw Leng Feng, he knelt down on one knee, "Dean, student Zhou Fufu, a student who graduated from this year's hot air balloon class, was assigned to deliver gunpowder materials to you." His Majesty has specially instructed that only you can direct the transportation of these materials, and no outsiders are allowed to interfere. ”

The martial arts academy added a hot air balloon class two years ago, in order to train qualified hot air balloon pilots, judging from this kid's flight just now, it is estimated that the results are the best.

Not thinking about this, Leng Feng leaned over to the basket and took a look.

Sure enough, the basket was full of small cloth bags, some of which showed yellow powder, presumably sulfur. Others, it should be saltpeter. As long as he gets some more charcoal, he can make his own gunpowder.

The basket full of sulfur and saltpeter in front of me was enough to make another batch of improvised thunderbolts.

"Erniu, find someone to move things to a room, keep them away from light and water, and no fire should come within 200 steps of it."

Seeing that Leng Feng had distributed the supplies, Zhou Fufu pointed to the sheep again and said, "Your Majesty said that you and the Duke of Xunguo have worked hard and made great achievements, and nothing else can be sent in, so I can only send you a sheep." ”

Looking at the sheep that was still screaming, Leng Feng said helplessly, "It's such a small one, do you want us to eat it, and the soldiers are watching?" ”

Although the emperor had good intentions, the most taboo thing in the march was that the main general ate alone, although the soldiers could not have any objection, but no general did so.

There is not much rice, at most it is enough for the whole army to drink a meal of rice porridge, and in those boxes, there are things such as wound medicine and bandages, and the most terrible thing is that there are actually some injections. Compared to those flashy things, this thing is still a little more reliable.

After putting away the airdropped supplies, Leng Feng called Ergouzi and Li Erniu to start arranging gunpowder. Since the emperor took the risk of sending him so many raw materials, it means that the movement on the border side will be very large, and it is likely that it will not be long before Yuangai Suwen will be chased to Cangyan City.

Park Xiuzhong, who originally had a little idea about Cangyan City, completely gave up his plan to attack Cangyan City this time.

There is a mountain spring in Cangyan City, and judging from the fact that there is no fire, the grain and grass have not been burned by the defenders. Now the Tang Army still has an artifact that can fly into the sky to send supplies

Cangyan City, the fool continues to stare at it!

In fact, Li Shimin sent hot air balloons to send supplies to Cangyan City, one of the purposes was to act, so as to relieve the external pressure of Cangyan City.

To launch a hot air balloon, it even requires the cooperation of the East China Sea Fleet to reach Cangyan City, and it is completely impossible to expect the hot air balloon to deliver supplies all the time.

In addition, the hot air balloon left behind is also a guarantee left by Li Shimin to Leng Feng and Zhang Liang. At least the two of them can be saved if necessary.

Whether they will use it or not, at least his heart has arrived.

On the side of Baishi City, just three ground-level thunderbolts turned the three fortified cities into broken walls, and the resistance in the city was so weak in the eyes of more than 60,000 troops on each road.

After the three cities were conquered, Li Shimin continued to lead the army forward, and the sooner he scored, the less Yuangai Suwen's army would gather, and the weaker the possibility of Gao Jianwu and Yuangai Suwen joining forces.

Although he did not doubt the outcome of the war, he was willing to speed up the course of the war.

The army advanced all the way, and when it encountered the pass, it was the process of repeating the bombing of the pass, clearing the pass, and continuing to advance, although there were casualties, but they were all within the normal range.

In addition, the military doctors of Datang are all trained in medical school, and they handle the injuries on the battlefield very well, as long as they do not die directly on the battlefield or on the way, when they return to the wounded barracks, about sixty percent of them have saved their lives.

In the past, this was completely unthinkable!

The army continued to advance, breaking through the pass one after another, until it reached the garrison mountain.

The garrison mountain is a dangerous place, the mountain range is strange and rocky, easy to defend and difficult to attack, relying on the natural danger of the city pass, it is much more difficult to attack than the ordinary city.

The defenders stationed on the hill had received some news of gunpowder weapons, and not only blocked the city gates, but also raised the city walls.

There is a flaw in the ground-level thunderstorm that breaks the city, that is, if it does not explode in the city gate, it cannot effectively destroy the city wall. If the horizontal surface of the city wall is allowed to meet the impact of the explosion, it is likely that several earth-level thunderbolts will not be able to achieve the effect of one.

Looking at the appearance of the mountain city pass in front of him, Li Shimin sneered, "It seems that you are on guard." ”

Li Jing measured the height of the city wall and said, "Your Majesty, the height of this city wall, although the thunder and arrows can reach the city wall, but they can't reach the back of the city, it is a little difficult to break through!" ”

After speaking, he also glanced at Li Xiaogong.

Among the people, who has the most say in the application of gunpowder weapons is Li Xiaogong.

Li Xiaogong saw Li Jing looking at him, so he said, "A simple ground-level thunderstorm to open the city gate hole can no longer work, the lower part of the city wall stationed in the pass is clearly a whole piece of natural rock, no matter how much ground-level thunder, it can't blow up a road in a short time." ”

Li Shimin frowned and said, "Is there nothing you can do about them?" ”

Li Xiaogong hesitated and said, "There is still a way, that is"

Li Shimin looked at Li Xiaogong, "If you have something to say, what kind of thing to sell!" ”

Li Xiaogong said the rest of the words: "It is necessary for the death squad to climb the city wall, and in the middle of the section, it is the junction of their natural city wall and the self-built city wall, and fill in the ground-level thunder." After the city wall is dismantled, the collapsed gravel can still fill the height gap, and we only need to pad some sandbags to enter the customs. ”

As early as the day he saw the ground-level thunder, Li Xiaogong knew that this game would inevitably evolve into a human bomb.

His hesitation just now was to struggle with whether to say this method, after all, this method is too inhumane.

Li Shimin picked up the telescope and checked the structure of the city wall, according to Li Xiaogong, maybe it was really feasible?

Li Shimin still couldn't do the matter of sending ordinary soldiers to death, but fortunately, he didn't lack dead soldiers, and it was still okay to order thirty or fifty of them to die.

Five hundred Dragon Scale Guard soldiers and five hundred Xuanjia Army soldiers formed a formation of one attack and one defense, and launched an attack on the garrison pass.

Their mission is to scare off the guards on the walls and create opportunities for the dead.

However, the guards stationed at the pass clearly did not want to retreat easily.

The trebuchet, the most primitive and terrifying weapon, played a huge role with the bonus of the height of the walls of the garrison mountain.

In addition, the number of trebuchets is sufficient, just a wave of stone throwing will make the Xuanjia Army and the Dragon Scale Guard lose less than half.

The armor of the Xuanjia Army could not resist the force of the trebuchet throwing stones.

Seeing that the Xuanjia Army and the Dragon Scale Guard were frustrated, Li Shimin hurriedly recalled them.

No matter how long it takes, where will these thousand people have to be explained!

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