After the second- and third-level mutants are on the wall, there is a clear division of labor, some of them are dedicated to destroying those defensive weapons, and some are to deal with those forces that resist. Another part rushed to the armored units in front of the wall.

If it weren't for the combat effectiveness of units such as the Beastmen, it would indeed be too strong, so that those mutants would not be able to parry at all.

The armored forces in front of the wall, probably already dangerous.

However, the real danger of the wall did not come, if the big Roshan were allowed to approach the wall. The big Roshan, which now looks like it's just a meat shield, will be turned into a super siege weapon.

Cai Ruichen can clearly remember that these big mountains can easily use several tons of building wreckage as weapons to smash into tanks more than a thousand meters away.

If it weren't for the fact that they were close to the walls and the streets of the city were too narrow to be used, the mere use of the remains of the buildings in the city would be a real trebuchet.

Perhaps it was the king of Erbilene who felt that such an attack was too slow, which made these big Roshan desperate to approach the wall.

However, this is also in line with the rumored image of mutants using weapons.

As for the army, this kind of warfare is already a very strong army, after all, there are several safe bases that can withstand such a combat method.

If it weren't for the firepower of the base, it would have been continuously strengthened in Cai Ruichen's more than three months of construction.

If all of the twenty Great Roshan were still alive now, the wall would have been breached by more second- and third-level mutants.

"Raise the first wall." After Cai Ruichen looked at Da Roshan, who had already approached the position of two hundred meters, he decisively ordered to the base.

Less than two seconds after his words fell, the entire ground in front of the wall. They all started to shake.

This kind of shaking. Let nine big Roshan. They all shook with it, more than the vibrations they caused as they moved.

Because in front of them, a crack twenty meters wide suddenly opened, a kilometer long.

As soon as this huge crack appeared, a black shadow quickly rose from the crack.

The black-blue wall, rising high, lies horizontally in front of the nine large mountains of meat.

The wall of the underground construction mode is also Cai Ruichen's last hole card. In order to be able to smoothly block the attack of the Erbil mutants.

Cai Ruichen was well-intentioned, not only built the first wall 40 meters high, but also built an underground wall, and the third wall was 60 meters high.

It is a ladder of defense, but this underground wall was originally only prepared by Cai Ruichen on a whim, and he also hoped that he would never use this wall.

But there was no way, and at this time, he had to use this method, which was originally intended to cover the retreat of the troops to the second wall.

Now the main forces have retreated to the second wall. Cai Ruichen also had to use this hole card.

On the raised wall, a dense line of sentry guns also rose from the wall. The twenty-meter-high wall is exactly the same height as these big Roshan mountains.

These big Roshan didn't seem to have any sense, and they didn't have any emotions when they saw the sudden appearance of the wall, but instinctively raised their arms to destroy the wall.

But the speed of the sentry cannon is much faster than theirs.

The sentry gun, which was also replaced with a 30 mm depleted uranium armor-piercing shell, could not be compared with the Getter cannon in terms of lethality due to the rate of fire.

But in fact, the power of the bullet, because it adopts the method of high chamber pressure, the lethality of the bullet is stronger.

The dense barrage, with trailing lights, is the relationship between every three depleted uranium armor-piercing shells followed by one tracer armor-piercing bullet.

The role of tracer bullets is to guide the trajectory of the operator, but the base does not need tracer guidance.

The reason why tracer is retained is purely a sound attack system, because in the Red Police Corps, all the machine guns are all three bullets followed by one tracer bullet, and the cost of tracer bullets in the base is the same as ordinary bullets of the same type.

Like a torrential rain, the steel rain kept spraying on the nine big meat mountains.

The dense sparks flashed again, and due to the appearance of the wall, the ground armored troops behind them all had no angle to attack, so only these sentry guns could attack these big Roshan.

But officially because of this, under the dense rapid-fire artillery fire, there was also the dense sound of steel crashing, and on the nine big meat mountains, the dense sparks bloomed like dense fireworks.

However, such an attack did not cause effective damage at all to these Roshan with super strong defense.

Almost all of the wounds on these big Roshan were caused by anti-tank missiles, tank guns and grenades.

And this kind of attack can slow down the movements of these big Roshan and make their movements a little slower.

It's just that this kind of blocking is only a little bit longer.

However, it was enough time to allow the armored forces in front of the wall to complete the retreat.

The retreat of the armored forces was imperative, because the number of shells on these tanks was not enough for them to hold out.

And with the emergence of a large number of second- and third-level mutants, there is no need for them to persist like this.

The battle has lasted for a short time, but many tanks have been destroyed. Utility infantry fighting vehicles also lost a lot.

It would only be a waste of soldiers' lives to continue to hold on.

As soon as the order to retreat was given, the gate of the wall slowly opened, and all the armored troops quickly withdrew behind the wall under the cover of the beastmen.

Then they all retreated in front of the second lane, where the next battlefield could be.

Because of this wall, there is not much hope of holding on.

At this time, the nine big Roshan, under the intensive firepower, began to smash up the wall.

A forward arc formation was formed to protect the second- and third-level mutants behind them from being attacked by the fire on the walls on both sides.

But now in order to destroy this wall, their formation has changed to a horizontal line, but at this time, there are not many second- or third-level mutants behind them.

These big Roshan, who were as tall as the wall, raised their black blood hands and smashed all the nasty sentry cannons first, and then smashed the wall frantically.

The walls that are up to twenty meters thick are not so easy to destroy, but the power of these big Roshan is also super perverted.

Pounding frantically against the wall, the wall was soon a cloud of rubble, and every attack could cause great damage to the wall. (To be continued.) )