Although Liu Bei and Zang Ba's city-digging tactics had an accident, the passage dug under the north wall of Pengcheng collapsed, and at least more than 50 auxiliary soldiers and young men were buried alive inside, but it also caused the north wall of Pengcheng to collapse with the collapse of the passage below, and part of it collapsed. （）

So a slope collapsed on this northern city wall, but Liu Bei and Zang Ba could send troops to attack the city wall directly through the slope.

Although this slope is relatively steep and not very easy to climb, it is equivalent to a V-shaped breach in the city wall facing the outside of the city, but Liu Bei and Zang Ba's soldiers can still use this breach to climb the city wall by tilting their bodies.

This is much easier to climb than a 90-degree wall, and you can directly rush up the rammed earth ramp without a ladder at all.

So Liu Bei and Zang Ba stopped digging the city, so they simply sent troops to attack this breach in Pengcheng, and Lu Lingqi and others, who were defending the city, did not expect such a change to happen, so they had to organize people to defend this breach with all their might.

For a while, a brutal offensive and defensive battle broke out around this suddenly collapsed city wall area.

Liu Bei and Zang Ba organized a large number of archers to cooperate with the siege, using feather arrows to suppress the defensive strength of the defenders on the city wall, and then a group of elite soldiers like death squads, holding shields and knives, rushed to the city wall through the breach.

And Lu Lingqi also organized archers on the city wall to fight back against the city, and then asked people to roll down falling logs and boulders on the city walls on both sides of the breach, and simply poured fire oil and lit the flames, turning the breach into a flame-baking area to block the approach of the attacking soldiers.

But this can only be blocked for a while after all, and as the flames are extinguished by the mud, sand, soil and stones, Liu Bei and Zang Ba's soldiers can rush up again.

In addition, most of the soldiers in Pengcheng are new soldiers who have not been trained much, and many people are afraid of cowardice and dare not move under the threat of feather arrows under the city, and some people have the courage to fight back, but they completely do not obey the command and waste a lot of rolling logs and stones used to defend the city, which makes the strength of the defense obviously weak.

Liu Bei and Zang Ba recklessly organized the most elite and ferocious soldiers to storm the city, and their lifeless posture made the soldiers defending the city panic.

Several times, Liu Bei and Zang Ba's siege soldiers had already rushed to the city wall, and they were almost able to kill the defenders on the city wall.

Lu Lingqi had no choice but to personally take Wei Xu and Cao Xing on the city walls on both sides to deal with some soldiers who had been killed, so as to temporarily stabilize the situation.

But their energy is limited after all, and Liu Bei and Zang Ba will also have generals such as Zhang Fei, Sun Guan and so on at any time, even if it is Lu Lingqi, they will not be opponents at all in the face of Zhang Fei.

Lu Lingqi also wanted to organize people to repair this collapsed city wall, but in the face of Liu Bei and Zang Ba's troops constantly rushing and killing, where would there be time for this repair.

Therefore, Pengcheng seems to have become precarious at this moment.

It was also at this time that a large number of soldiers suddenly replenished from inside Pengcheng, and then a series of crossbow machines also appeared on the city wall, shooting crossbow arrows at Liu Bei and Zang Ba's soldiers under the city.

These crossbow archers obviously have a tacit training cooperation, often after the first one shoots the crossbow arrow, then retreats, and then the other archer who has already loaded the crossbow arrow shoots the crossbow arrow at the city again, and then also retreats and is replaced by the next crossbow archer.

For a while, a crossbow arrow array composed of three crossbow archers as a group of rotating positions appeared on the city wall, and the crossbow arrows seemed to be spraying under the city wall without stopping, and the offensive of Liu Bei and Zang Ba's soldiers attacking below was immediately stagnant.

In the area where these crossbow archers are located, there are also shield men holding large shields to build a canopy against arrows, as if a low anti-arrow fortification has been constructed on the edge of the arrow battlements on the city wall, so that the feather arrows thrown up from the city will suddenly be a little less threatening.

Therefore, the crossbow archers on the city wall can look at the crossbow arrows more confidently and boldly.

Occasionally, someone will be accurately shot by the archers under the city walls, but the person who is hit by the arrow will soon be replaced by someone who lives or dies, and the crossbow arrow array will not have much stagnation.

At the same time, at the gap between the two walls, there were also some heavily armored soldiers, holding large shields, to fill them, like a man-made wall, blocking the slope of the city wall, preventing the attacking soldiers from rushing up the wall.

Behind these heavily armored soldiers were soldiers with spears, holding spears in the notches between the splices of the big shields, and stabbing them outward, stabbing the soldiers who rushed up into strings one by one.

Then there were also crossbow archers who specially aimed at the gap on this side, and fired several rounds of crossbow arrows, which inevitably caused the attacking soldiers who had been piled up under the slope of the collapsed breach of the city wall to suffer heavy casualties one by one, and many people's bodies were covered with crossbow arrows, and they fell to the ground like hedgehogs.

These garrisons who filled in the city were obviously much more elite than the Xuzhou recruits in Pengcheng, and for a while, Liu Bei and Zang Ba, who couldn't adapt to it, couldn't get close to the gap in the city wall.

At this moment, the totem flag of the Divine Arrow Battalion was also lit up on the city wall, and a "Xu" character general flag was erected, but it turned out that Xu Shu took over the defense of the Divine Arrow Battalion with the elite soldiers of the Divine Arrow Battalion from Guangling City.

Obviously, the sudden collapse of the north wall of Pengcheng was also discovered by Xu Shu and Zhang Liao, who were watching the war from afar.

Xu Shu had a judgment at the first time, and Zhang Liao led the way into the city from the other gates of Pengcheng, and then quickly rushed to the north city to support.

It was also thanks to Xu Shu's timely response, so it was just right to choke the siege momentum of Liu Bei and Zang Ba's coalition forces at once, otherwise Pengcheng would probably be broken.

In addition, there are more than 2,000 crossbow archers in the soldiers of the Divine Arrow Battalion brought by Xu Shu, which can be regarded as a terrifying class of troops defending the city.

Originally, Taishi Ci left Xu Shu to protect Guangling County, and deliberately left these crossbow archers for Xu Shu to defend against possible changes, but now these crossbow archers appeared in time for the defense of Pengcheng.

A crossbow arrow array composed of three people in rotation, two thousand crossbow archers can form at least six hundred groups, so six hundred crossbow arrows can form a continuous rain of arrows almost non-stop, which is naturally more terrifying than the threat of bows and arrows shooting feather arrows.

What's more, now it is a defensive battle in the city, and the weak point of the relatively close range of crossbow arrows has also been eliminated, and when shot from the city wall, even if the crossbow arrows are nailed to the shield, they can penetrate the wood for three points.

And if the crossbow arrow is pierced on a person's body, it can definitely penetrate the head and chest at once, even if they are wearing a battle helmet and leather armor, they can't have much defensive effect, so Liu Bei and Zang Ba's siege soldiers can't help but retreat one after another.

Even the archers under the city could not face the rain of crossbow arrows without stopping, and they were shot back for a while, losing a little courage to fight back......