The Han army attacked the city with all its might under the command of Zhang Hu, and the soldiers used their lives to attack like an angry sea, and that kind of determination was very different from the past, and there was a lot of strength not to break the southern vow and not to return. At this time, Cao Hong was full of doubts and couldn't think about it in detail, today was the day with the largest number of people and the most fierce since the Han army launched the offensive, and it was too late to command the defenders to defend with all his might, and even if he didn't know about the burning of the wall, he had to resign himself to fate.

The rich fire oil is tightly attached to the city wall and burning, the city head is not only shrouded in black smoke with a peculiar smell, the temperature is also very high, although the thermal conductivity of the masonry is not good, it can not withstand the fire on the city wall, it is too big, as the burning continues, the city bricks also begin to make a loud sound of puffing, bursting from the inside! Its surface also showed a dark red, seeing this scene from the clairvoyant mirror, Zhang Hu, Zhang He and the others' expressions were slightly relaxed, which was very similar to the experiment done by the third rate before, and it seemed that the dark red of the Jiameng city wall was a little more intense than the experiment. This is not contradictory, it is one of the requirements of the Son of Heaven to increase the difficulty of the experiment.

"Commanders, generals, the fire can be more ferocious, it seems that it can be attacked by waterwheels in another hour." Everyone put down the clairvoyance and all their eyes were focused on the third-rate person, this person is a real expert in this area, and everything in front of him can also show the correctness of his proposal, after observing for a while, the third-rate put down the clairvoyant mirror and replied, his tone was very cautious when he spoke, but the excitement and nervousness in it were difficult to hide. How could I have seen such a tragic and tragic scene on this magnificent battlefield in the equipment yard before?

Tens of thousands of people fighting, life at this moment became extremely fragile, but none of the soldiers flinched, they were using their own flesh and blood to face the danger of Xiongguan, that kind of momentum of unity made the third stream of blood Zhang, at this time he hoped more than any moment that he could come up with a way to let the Han army quickly break through, so I don't know how many loyal and brave soldiers' lives can be saved, the raging fire in front of him is only half of the success, he wants to do his best to do everything he can.

Listening to the words of the third rate, Zhang Hu bowed his head slightly and refocused his eyes on the battlefield, the purpose of the Han army's all-out attack was to distract the defenders as much as possible to ensure the success of the tactics, every moment of delay is the life of the soldiers, but for the greater strategic purpose it has to be so, Ci Bu is always the iron rule of the battlefield. More than 10,000 soldiers of the Han army have fallen before this Xiongguan, and the determination to take it down from Zhang Hu is extremely firm, and the price has been paid must not be without gain, which is also to avoid paying more casualties under it in the future.

The snow flakes in the sky are constantly increasing, the north wind is howling more closely, and the forest in the distance has been hung with speckled snow, but the soldiers on both sides of the Jiameng Pass are sweating profusely in the snow, and the blood of the soldiers is particularly eye-catching against the background of the snow! Only the section of the city wall chosen by the Han army was not contaminated by the heavy snow under the burning fire, and the equipment battalion continued to fire thunderbolt canisters on it, but at this time, thousands of stone shells had been transported around the sky cannons, and it was obvious that their weight had increased compared to Yanzhou.

After nearly an hour of burning, the sound of Bibi puffing became more and more incessant, and the shouts of soldiers on both sides could hardly hide it, and the fire was more than a few feet above the head of the city, and the defenders on it withdrew ten paces away because of the scorching air current! Although they are confused in their hearts, they are also very sure, in such a fire, the Han army will never attack the city, and the flesh and blood can't resist such a high temperature at all, so they should pay attention to defending elsewhere.

The flames and temperatures brought by the burning of the fire oil are extremely high, but the burning is also extremely fast, after the equipment camp stopped the firing of the thunderbolt canister, the flame gradually decreased, and the whole city wall emitted a dark red light, without the hindrance of the flames, when the huge snowflakes came into contact with it, the sound of sizzling accompanied by white smoke joined in! Zhang Hu, who was on the high platform to observe the overall situation, finally raised the red order flag in his hand after nodding from the third rate!

The elite soldiers selected by the Tiger Guard, Yanyun Army, and Chang'an Battalion saw the banner in the hands of the military division, and began to divide into several teams and rushed to the city wall skillfully, the momentum and speed are no different from usual, the only difference is that in the past, they carried a ladder to attack the city, but today it is a waterwheel! This fell into Cao Jun's eyes and there was a burst of curiosity, what kind of new weapon did this huge equipment with a skin bag belong to the Han army? Could it be that the previous fire was the prelude to this attack? What is the purpose of the Han army's attack on the city tonight?

Soon the defenders understood the role of those tools, and the Han army under the city stopped the impact after pushing it to a distance of more than ten steps from the city wall, and more than a dozen soldiers pushed a rocker behind it, and a strong column of water began to pour on the dark red city wall! If the snorting sound and white smoke brought by the heavy snow just now were not conspicuous, at this time, dozens of water columns were dumped on the city wall at the same time, and the sound and white smoke were undoubtedly magnified dozens of times, and the vision became blurred.

The steam clouds generated by the hot wall encountering the icy water flow were steaming, which greatly hindered the sight of the defenders of the city to some extent, and the rest of the Han soldiers did not slow down the siege, which made the rain of arrows at the head of the city never be able to form an effective killing effect on the siege soldiers below, and the other party had already done all the defense work, do not underestimate the distance of more than ten steps, but in the actual battle, it can make the rolling wood and stone of the Cao army not exert its power, and the shield hand of the Han army can fully guard against the arrows falling from the city, And this change was not expected before the war!

These rushed out of the waterwheel Zhang Hu is the pursuit of quantity and speed, its quality and the bombardment cannon is obviously not the same, some of them can not be sprayed a few times before the breakdown, but the results of the Han army's drills in the past few days have appeared, once the waterwheel breaks down, the soldiers on the side will immediately remove them from the battlefield, and even if there is a new waterwheel to replace it, everything seems to be in order and not chaotic at all, the Han army has repeatedly fought that kind of coordination and cooperation between each other has reached the point of perfection, That kind of self-congestion is almost impossible to occur at this time.

When the white smoke gradually dissipated, the vision of the defenders at the head of the city cleared, and the arrow rain began to thicken again, when the Han army's task of attacking the wall by water was also completed, out of the pursuit of effect, Zhang Hu did not hesitate to suffer casualties and maintained the waterwheel offensive for half an hour, the conversion between extreme heat and extreme cold made the unevenness of the city wall appear more obvious, and the cracks on many city bricks were also constantly expanding, and these scenes were also the effect pursued by the Han army in this tactic.

With Zhang Hu's order, the water convoy under the city retreated like a tide after completing the task, this action made Cao Junjun suspicious as just now, it was difficult to figure out what medicine was bought in the Han army's gourd, but Cao Hong had already begun to have a bad premonition in his heart! The Han army's move must be targeted, with Zhang Hu, Zhang He and others, the use of troops will never be useless, and at the moment, he immediately pulled several teams of elite soldiers to closely observe the movements of the Han army in this section, and now this is the only way he can deal with it, I hope the other party is just bluffing.

As soon as the comrades under the city retreated, the Sky Bombardment Cannon of the equipment battalion began to get busy again, and the huge flying stones were constantly thrown up and smashed on the city wall that had been torn by fire and water with a huge momentum, this situation was not uncommon in the siege of the city in the past, but at that time, the Sky Bombardment Cannon was aimed at the enemy's city head! Zhang Hu, Zhang He, Zhang Liao, and the third-rate including Ma Chao and Pang De, who had been guarding and watching the battle under the city, are now all one action, listen attentively! The third rate said that the solidity of the city wall will be greatly reduced after the fire is poured with water, and the sound of the boulder fired by the cannons hitting it will be different from usual.

After a while, the stones fired by the Sky Bombardment Cannon had begun to accumulate under the city, and all the shooters raised the frequency of the fire to the maximum, at this time, a striking crack began to appear at the top of the city wall and quickly spread from top to bottom at a speed visible to the naked eye, and the crack with it as the main line was still spreading around! Through the scene of torches under the city, the Han soldiers and soldiers are clearly visible, although the Cao soldiers at the head of the city are difficult to see due to the relationship between the perspective, it does not mean that they can't feel it, the originally strong city under the bombardment of the other party actually came from the feet of a tremor, and there is a faint tendency to increase. There had never been such a situation in the previous siege battles, could it be that the Han army had the help of heaven and even the city walls were about to collapse?

Soon Cao Jun's ominous premonition became a fact, the huge city bricks were broken into several pieces and shattered from top to bottom, and many places exposed the rammed earth inside as the city bricks fell off, and they were also constantly collapsing! Seeing this scene, Zhang Hu and the others all had smiles on their faces, and the sky-bombarding cannon of the equipment battalion was fired more frequently at this time! The Cao soldiers at the head of the city only felt that the vibration under their feet was getting bigger and bigger, and they had to disperse to both sides, and the boulders that continued to fly began to attack the rammed earth layer that had lost the protection of the city bricks, and the solid soil layer was destroyed by the instantaneous conversion of high and low temperatures, and finally began to collapse after the continuous blows of the Han army, at first it was only a small piece, and then the scale continued to expand to the end of the collapse of the soil layer, and it brought up the dust in the sky, and for a while, the city and the city were covered by dust, and it was difficult to see the details of the city wall!