A few days later, when the army led by Liao Xingzong finally entered the vicinity of Shanhaiguan and faced the fortress, Di Qing also carried the army and arrived near the fortress, not choosing to be directly exposed to the Liao army, but quietly camping on the back, in a place that could not be seen in sight.

To a certain extent, they belong to the backing of the fortress, whether it is to take advantage of the gap between attacks to arrange rotation for the personnel of the fortress, or mentally, their presence will increase the defense of the fortress by a few more grades.

This time, the Liao army was more fully prepared, Xiao Hui was steady enough, and started the construction of various siege equipment in advance, and similarly, the army of Liao Xingzong also brought more things and craftsmen, and these people spent half a month to build a decent siege equipment.

The ladder, the ladder that is enough to reach the fortress, the rushing car, the rushing car that is so huge that it is difficult to move, these, for Xiao Hui and the Liao people, are already armed to the teeth, and they should be enough to break through the city.

The horn of the siege sounded, and Liao Xingzong even stood on the high platform in person, watching the results of the siege, in his opinion, these soldiers under his command were enough to drown the four lonely buildings, and their defenses could not be strong.

In the era of cold weapons, to be precise, before the birth of the fortress, the defense of a city, no matter how strong it is, there is a limit, when the number of besieging the city far exceeds the defender, the city does not have the possibility of protection, just a dying struggle.

But in front of the fortress, all this has changed, this is not the time of the embryonic form, and everything is considered imperfect, this is a fortress that is armed to the teeth from beginning to end, full of a sense of killing, everything that needs to be considered, what does not need to be considered, has reached the limit.

First of all, it is the rush that rushes up, which is not so reliable, and the number is not a lot of ladders, the rush is more reliable, according to the investigation of Liao officials, the last army to appear here is not long from now, that is to say, this one fortress, the total construction time, less than a month.

1 month, for many people, should be regarded as a relatively long time, but for a city, it is a drop in the bucket, even if it is a small county seat, to rebuild, there is no three or five years, don't think, a strong fortification, such a short time can be built, this is impossible.

No matter how smart Ren Xiaohui is, he will not know that the Northern Song Dynasty has already made cement, before having cement, and after owning cement, the efficiency of construction is completely two different concepts, not to mention reinforced concrete and various tools.

The fort is only the time to build, not even 10 days, and the time for cement solidification is added in the middle, the traditional cement may take ten days and half a month, but Ding Haijun has undergone special adjustments, and the new cement made is at most a day or two, and it can have strength and continue to build, and from the completion to the present, there is at least a month, and it has already solidified and is very strong.

Early cement, for example, in the ancient Roman period, he was better than rice cereal and the like, but the good was limited, but Ding Haijun from the beginning, step by step to the present, has long been a high-grade cement, this kind of cement is almost no different from steel under the cooperation of reinforced concrete.

You must know that the outer layer of the fortress, especially the circle below 5 meters, in addition to masonry as a filling, there is at least a two-foot reinforced concrete structure, this thing, is not an ordinary force can deal with, even if it is a large-caliber heavy artillery in the era of thermal weapons, without armor-piercing shells and new gunpowder, there is no good way for this pure reinforced concrete permanent fortification.

The Song army in the city, looking down, pushed the heavy rushing cart, and wanted to push the Liao army to the fortress, but did not meet the attack, but let them come.

Maybe a hammer of up to 300 catties, even if it is an iron hammer, what can it do, when it was tested in the Privy Council, it was a thousand catties of fine iron hammer used, and a large number of people were sent to hammer for almost a quarter of an hour, there were some traces, and the cement was broken, but it was at least a long time before it was destroyed.

It is impossible to give them so much time to attack the city, and how much destructive power can the Liao people take.

In fact, it is almost impossible to push the car over, because along the way, there are all kinds of barbed wire and all kinds of horse rejections, which need to be cleaned up by Liao one by one.

How can this be cleaned up, only human lives can be used, and Xiao Zonghan, who was guilty of meritorious service in the middle, bore the brunt of the attack and was sent to carry out the impact, 4 times in a row, at the cost of 7,000 casualties, three or four roads were cleared.

In fact, these dead defenses, if you want to clean up, will definitely be unstoppable, but the other party's consumption is also gratifying enough, and almost uses human lives to push out one road after another.

The more the Northern Song Dynasty defended it so strictly, the more happy the Liao State actually became, which proved the importance of these siege equipment, in the eyes of Liao Xingzong and civil and military officials, as long as these things could be transported under the city wall, it was almost a certainty to conquer the city wall.

They didn't know that the Song army was almost half attacking and half releasing water, and let them in.

With such a large amount of siege equipment, not to mention wood, there are many peaks around it, and dense forests are everywhere, as long as you have the heart and put in the strength, you can always cut down a lot of wood, but what about iron?

There are more than 100 punches in total, according to the cost of 300 pounds of iron for a punch, it is almost 30,000 pounds, which doesn't matter to the Northern Song Dynasty, for the Liao Kingdom, it is definitely sent, and even in a sense, there are no long arrows that were taken before, maybe, they can't even make up this.

Really killed more than 100 punches, so can Liaoguo create so many punches, the same, directly closer, according to a punch of 50 people, it is almost 5,000 strong men, which is not small for Liao, once the loss is made.

After a lot of hard work, and even a lot of sacrifices, the rush car was finally pushed in front of the fortress, and the follow-up Liao army was happy in their hearts, the city wall may be able to block the attack of one or two rush cars, but there are so many, and it is for a fortress, it is always possible to kill the fortress, one by one, pull out this hard bone, it should not be a problem.

When the first one rushed and hit the fortress, a huge sound resounded throughout the battlefield, and the Liao army in the rear was overjoyed and began to mobilize troops, as long as the fortress had the possibility of collapsing, these cavalry would attack immediately.

The distance was too far away, coupled with the fact that there were no telescopes, they simply did not know the desperation of the Liao army that operated the rushing car.

A large number of soldiers maneuvered the rushing car, the huge dead weight, plus the head, not to mention hitting the bricks, even if it touched the stones, it could be smashed open, but this thing smashed on the outer reinforced concrete, and there were almost no traces.

It's not nothing, the 300 pounds of iron head is directly crooked, the effect of force is mutual, the iron head of the rushing car, impacting the wall of the fortress, impacting with huge force, the purpose must be to break the city wall.

But now, this is the opposite, the hardness of the city wall, on top of the rushing car, plus this is a huge fortress as a whole, some of the forces are directly dispersed, and the real effect on which point of the fortress is not all.

The force of the anti-shock, however, acted on the punch, the hardness itself was weak, and the force was the same, and there were huge traces on the iron head, and the structure of the punch itself was also greatly affected.

With such a lot of power, but it has no effect, this is devastating, but at this time, what can be done? continued to rush, but after a few clicks, a rush fell apart.

Itself, when the Liao State built the punching car, the structure was not so solid, and the north itself was not the focus of the manufacturing industry, and it was put by the Liao State for so many years, they rarely thought about the siege of the city, and it was not even enough to eat the old book.

Liao Xingzong and Xiao Hui, their faces were dark, the distance was far away, and they couldn't see clearly, but the other party's fortress was fine, but the car fell apart, what does this mean.

It seems that starting from this one rush, it started one after another, and gradually fell apart, but the fortress was fine.

At this time, even the Liao people, no matter how wooden they were, could see that this rushing car could not deal with the fortress, and was about to order the rushing car to come back.

At this time, the attack of the Northern Song Dynasty began, one by one the gunpowder bags were ignited, and then thrown down, this is also made by the Ding Navy, to put it bluntly, about four taels of gunpowder and a large number of iron pieces, as long as they are lit and thrown down.

In itself, Zhao Xin was supposed to make grenades, and after the gunpowder was basically completed, and the gunpowder that was even better than the black powder was developed, the grenade was no longer a problem, but it was just a wooden handle and a cast iron projectile body.

However, after thinking about it, Zhao Xin still did not provide such a weapon to the Northern Song Dynasty, but instead provided a simple method of wrapping iron with gunpowder and then igniting the fuse outside, the principle is the same, but the power is very different.

Even if it is such a different power, it is enough for these rushing cars, these rushing cars exist to impact the city wall, not only are they huge, but they also have a device to block arrows, either forcibly smashed with boulders, or cleaned up with mobile forces, in short, it is not so convenient.

For the fortress, this just shows the weakness, the fortress has fewer personnel, and it is mainly based on bows and arrows, and it is even more impossible to come out to fight, as long as the arrows can't be shot, there is no problem.

However, the gunpowder bag and the iron block, these may not have an impact on the hedge car itself, and the gunpowder of 4 taels, as long as it is not thrown directly on the rushing car, will not cause huge damage, but the iron blocks that exploded in the air are very terrible.

Under a large number of gunpowder bags, there are almost no dead ends, and every place cannot avoid the attack of these things, and the iron pushed by gunpowder is lethal within a range of several meters.

The explosion was not too big, but loud enough, so that Xiao Hui and Liao Xingzong invariably remembered the Xingqing Mansion back then, at that time, under the premise that they could not understand, the wall of Xingqing Mansion fell.

This time, they wouldn't have thought that it was the fortress that was knocked down by them, that was impossible, looking at the countless screams and remembering, the entire rushing team was in chaos.

Rushing to the car and around, almost more than 5,000 Liao troops were concentrated, under the attack of the gunpowder bag, almost devastatingly hit, a total of more than 800 gunpowder bags, which contained almost 100 sharp pieces of iron, under the power of gunpowder, four impacts, almost tearing everything, really touching it to die, rubbing to death.

In just a few dozen breaths, when the explosion ended, almost everyone was injured, nearly half of the personnel were directly hit and killed, and the rest were also howling miserably.

Under the fortress, under the premise of a large number of casualties, even if it is intact and cannot bring the rushing car back, it is a death, let alone injury.

An attack that took half a month to make, and the elite troops were deployed, and in this instant, it collapsed, for the Liao State, it was a huge blow to morale, and the most likely way to take the fortress was actually just a joke, and it didn't even last for an hour, and it took a lot of manpower and material resources to make the rush, and it was discarded under the fortress.

"Generals, who will take him for the widow!" Liao Xingzong laughed angrily, and directly came out with such a sentence, but there was a dead silence below.

Forcibly attacking the fortress, that was committed by Xiao Zonghan, he also lost more than 10,000 troops in a short period of time, and today, the use of siege engines is the same result, even the carefully prepared rush can't shake the fortress, do you have to rely on their flesh and blood?

Liao Xingzong was about to get angry, but was persuaded by Xiao Hui, Xiao Hui can be said to be the highest status among the current Liao generals, not only his own position is high, but also his relationship with Liao Xingzong is good.

Under Xiao Hui's persuasion, Liao Xingzong's idea of continuing to attack was abandoned, and then, if he didn't think of any other way, or bypassed here, no one would attack directly.

Liao Xingzong's retreat, the fortress once again made contributions, which was a huge encouragement for the Northern Song Dynasty army, this time, there was no need to let the other party clean up the battlefield, because Di Qing led the army here.

Soon, let the archers set it up, then send the hoplites, clear the barbed wire, and rearrange it, and then start cleaning.

Looking at the Song army that suddenly appeared, the Liao army didn't make much movement, they hid in the camp, watched the Song army clean up step by step, rearrange the defense line, and by the way, provided some materials and replaced a certain number of personnel to the fortress, and after doing all this, they left with relief.

After the siege war suffered heavy losses in Liao, it once again returned to the original point, which was the origin of the extremely depressed Liao, and the generals of the Liao State thought of a way, but found that with such a strange combination of levels, there was no way at all, and even if it was a liver explosion and a life, it might not be able to rush through.