The collapse of the Xindu city wall is completely a process from quantitative change to qualitative change, under the blow of the catapult wheel of the Bingzhou army, this city wall, which is known as impregnable, has become full of cracks, thousands of holes, the whole wall is seriously distorted and deformed, and finally it is overwhelmed and collapsed.

When the tall walls fell, the moat was filled.

This was completely within Yanghu's calculations, so in the past few days of fighting, Yanghu had never sent infantry to fill the moat at all.

You must know that filling up the moat is a big project, and in a state city like Xindu, the moat is both wide and deep, even if the state army prepares tens of thousands of sandbags, it may not be able to fill the moat.

Moreover, the moat is quite close to the city wall, and it is completely within the range of the enemy's archers, and if the state army forcibly fills the river, it will have to guard against the enemy's bow and arrow attacks, which will inevitably cause certain casualties.

However, as long as there is a moat in the besieging city, the besieging army must first fill in the moat before it has the opportunity to attack the city wall, which means that filling the moat is almost an unavoidable problem, and no general is willing to go to this thankless job, but he has to do it as a last resort.

But Yanghu has other plans, these few days of attack, he didn't send someone to fill the moat at all, because Yanghu has his trump card in his hand - catapult, Yanghu secretly calculated, the city wall of Xindu is relatively high, if the city wall collapses, this part of the upper section of the city wall will fall into the moat, with the volume of the city wall, it is far more huge than tens of thousands of bags of sand, and it is natural to fill the moat.

Therefore, the state army has been waiting for the moment when the city wall will collapse.

The Xindu city wall is indeed much stronger than Lecheng's, and the Jizhou army also uses the method of repairing the city wall every night to restore blood, which makes the catapult fight very hard, if it weren't for Ma Long's proposal to change the way of attack, concentrate on attacking one place, I'm afraid that if you want to collapse the city wall, you don't know how much time?

It was through this continuous offensive that the Nakaju army completely destroyed the walls of Sindu in less than two days.

The collapse of the city wall swept up the sky with yellow dust, obscuring the sky and the sun, and when it smashed into the moat, it produced a huge wave and splashed the water, and it was like a torrential rain on the catapult array.

The catapults were drenched in soup, but no one complained, but cheered in unison, and after several days of unremitting efforts, they finally succeeded in destroying the outer walls of Sinto.

Yanghu immediately gave the order, and the infantry troops attacked.

Because the attack area of the Bingzhou army was relatively wide, the collapsed city wall was as wide as half a mile, and the Bingzhou army, which was already ready to attack, heard the sound of the war drums of the attack, and immediately rushed towards the gap in the city wall with a shout, and the offensive was like a flood that burst the embankment, and it was unstoppable.

The front end of the wall fell into the moat, and the moat was filled in, forming a huge slope, and after the collapse, a huge amount of dust and smoke enveloped the castle, and it was difficult to distinguish people within ten steps.

The state army rushed forward without waiting for the dust and smoke to dissipate, and they had to seize the chaos caused by the collapse of the city wall at a moment, and quickly seize the advantageous terrain without giving the defenders a respite.

When the city wall of Lecheng collapsed, the defenders of Lecheng gathered at the gap, wanting to use the human wall to block the offensive of the Bingzhou army, but with the combat effectiveness of the Jizhou army, in this kind of short-handed battle, it was impossible to be the opponent of the Bingzhou army, and their mobility and rapid reaction ability were not as good as the Bingzhou army, so the Bingzhou army concocted the same method, hoping to control the gap in the first time and open up the road to the city.

However, the gap that is half a mile wide can no longer be called a gap, and the state army rushed up the slope, and the dust and smoke are slowly dissipating, but the strange thing is that there is no Jizhou army to block the gap, and it can even be said that there is no one, obviously, the Jizhou army has given up here.

Although it was somewhat unexpected, the city defense structure of Xindu was different from that of Lecheng, which was only a single city wall, and after the city wall collapsed, there was no danger in the city.

Xindu is a double city wall, after the collapse of the outer city wall, there is still an inner city wall to defend, and now the situation obviously proves that the Jizhou army has given up the outer city wall and concentrated its forces to defend the inner city wall.

Since the dust and smoke had not completely dissipated, and the enemy situation in the city was unknown, after the men and horses from all walks of life reached the gap, they did not rush forward, but stayed in place, and quickly reported the situation to Yanghu and Ma Long.

For the city defense situation of Xindu, Yanghu is also well aware, and the Jizhou defense map provided by Fang Bu has clearly marked the double city wall structure of Xindu.

Therefore, breaking through the outer wall of Xindu is not equivalent to breaking through Xindu, and the state army must strike while the iron is hot and break through the inner city wall, so as to really take Xindu City.

The area covered by the dust and smoke is very large, but it dissipates relatively quickly, but it is only a little more than a moment, and the dust and smoke have dissipated, and then Yanghu can climb the ruins and have a glimpse of the end.

Between the inner and outer walls of Xindu, it is the distance of a stone's throw away, the middle is completely empty, there are no buildings, this is obviously a careful design, the besieging army after breaking through the first wall, will inevitably attack the second wall, this empty area does not have any cover, as long as you enter this area, it is completely in the defender's bow and arrow coverage, become a live target for the defenders.

And the catapult can no longer be used, the catapult is extremely heavy, and it is almost impossible to climb over the gap in the ruins that is as high as Zhangyu, unless the state army spends a lot of effort to clear a passage, but so many earthworks, if you want to clear it, I am afraid that it will not be possible to complete it in a few days alone.

What's more, once the catapult enters the area between the inner and outer walls, it is within the range of the defenders' bows and arrows, and is very vulnerable to destruction by the defenders.

The catapult's great advantage was its range, as no other weapon could attack it, allowing the catapult to fire stone projectiles without fear of being counterattacked.

However, after entering the inner city, if the catapult is attacked by dense arrows, it will not be able to carry out the projectile operation at all, and if the Jizhou army uses a large number of rockets, the survival of the catapult is a problem.

Therefore, after seeing this terrain, Yanghu decisively gave up the idea of using catapults again, and it seemed that if he wanted to capture the inner city, he had to use the original siege method - ant siege.