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The dust and smoke from the blast area gradually cleared, leaving behind a large area of mutant corpses that were still burning.

But the mutants who continued to pour out from the county town did not stop, rushed directly through the area of the explosion, and continued to run towards the wall.

These controlled mutants don't seem to be much different from the wooden people, and they don't have any fear, but they seem even more cold and crazy.

A pair of bloody pupils, all staring at the mobilized soldiers on the wall.

Even under the cover of the artillery fire just now, killing and injuring no less than thousands of mutants, it was as if nothing had happened.

At present, eight 155-mm field howitzers are still firing, and the large-caliber guns that give full play to their rapid-fire firepower will soon blow up the land outside the wall.

The road to the county seat also had to be rebuilt before it could be used.

The street lamps on both sides of the road, as well as the withered flower beds, are all in shambles.

The bullets that rained down on the wall were just a hundred meters away.

But the distance is being quickly shortened, but fortunately, the previous firepower is covered, so that the attacking mutant team has a gap in the continuous attack.

With a moment of powerlessness, the pressure on the wall has been slightly relieved.

However, before Cai Ruichen could breathe a sigh of relief, a large number of second-level mutants appeared almost simultaneously on the periphery of the county.

When the smoke of artillery fire had just dissipated. These second-level mutants bring more ordinary mutants with them. Rushing towards the wall.

The speed of a normal mutant. It's fast enough compared to normal humans, but those tall second-level mutants are even faster.

At a distance of 100 meters, it was only less than three seconds for these second-level mutants.

There were about thirty or forty of these second-level mutants, and they didn't even turn a corner along the way, and in the process of running, they directly knocked out all the ordinary mutants in front of them. Footsteps kept approaching the wall.

"Damn, the snipers are all aiming at those Level 2 mutants." Seeing this, Elleyesel was very anxious and gave the order.

Despite his timely order, by the time all the snipers began to target the Level 2 mutants, they had already run to a distance of no more than five hundred meters from the wall.

Natasha, who was the quickest, had already quickly killed three second-level mutants before the other mobilizer snipers could make a move.

However, the number of second-level mutants is still too much compared to her strength alone.

When the other mobilizer snipers fired, they had only killed less than ten second-level mutants in total.

Because even the lethality of an anti-materiel sniper rifle can only hit the heads of these second-level mutants. It is possible to snipe the other party.

And the second-level mutants in the running are too fast. In the process of aiming, the opponent has already run hundreds of meters, and more than a dozen snipers can kill five or six, which is already considered very lucky.

Cai Ruichen didn't use a sniper rifle, and there was less than four hundred meters left, which was more than ten seconds for these second-level mutants.

Once these mutants are allowed to jump onto the wall, it will be a huge disaster.

The metamorphosis of the second-level mutants is enough to quickly kill the mobilized soldiers in seconds, once these dozens of second-level mutants are allowed to kill on the wall.

Cai Ruichen can only choose to run away, and he can completely declare the defense failed.

Because even Natasha, the General, Ralph and the others would not be able to kill so many second-level mutants in a short period of time.

The ordinary mutants who follow the second-level mutants will also climb the wall in large numbers, and as many soldiers as there are soldiers on the wall, how many will die.

After all, outside the wall, there are still tens of thousands of mutants, and in close hand-to-hand combat, with the same amount of troops, it is definitely the side of ordinary soldiers who lose, and it is impossible for them to be the opponents of mutants.

"Base, activate the five sentry guns."

On the wall, the approach of those second-level mutants did not let Cai Ruichen move even a step, and he was a little frighteningly calm, and decisively activated his back hand.

Even if he used his hole cards at the beginning, he had no choice.

This is only the second wave of the mutant attack, and it has already put the wall in a huge crisis.

At this time, even if there are good means, they can't be kept.

After receiving Cai Ruichen's order, under the wall, the flat ground suddenly cracked, and the sound of mechanical gears running came out, and platforms that were almost five meters square suddenly rose a little from the ground.

Immediately, the middle of the platform opened quickly to the left and right like two gates, and a square turret rose from below, and two barrels protruded from the front of the turret at the same time.

Twin-mounted 30-mm rapid-fire machine guns - Sentinel guns.

The second defensive unit drawn by Cai Ruichen is also the first firepower unit to defend against counterattacks.

As soon as he drew the sentry cannon, he built the sentry cannon, which only took an hour to produce, under the west wall, using the hidden underground construction mode.

These sentry guns can be said to be the strength of Cai Ruichen's defense, with a 30-mm twin, the rate of fire can reach an astonishing 800 rounds per minute, and the rate of fire of a single barrel is the same as the maximum rate of fire of the Type 20 assault rifle.

The main thing is that rapid-fire guns, like all defensive units, do not need additional refills, as long as the base's electrical load does not exceed the standard, it can be fought forever.

To put it simply, as long as there is electricity in the base, it is an infinite number of shells.

The sentry cannon that appeared quickly roared for the first time, and the dense cannon sound instantly drowned out all the sounds.

Just the sound of the five-seat sentry cannon firing had a deafening effect.

The five sentry guns that formed a fire net, each shell shot out, with tracer light, ten dense rays of light, just under the wall, converged into a large net composed of firepower.

The second-level mutants who are attacked first, the defense that can withstand heavy machine guns and ordinary rifles, are instantly shredded without hindrance under the rapid-fire machine gun.

The dense cannonballs also brought layers of blood mist among the mutants, completely dyeing a large area of land in front of the entire wall.

At this moment, some mobilizers even forgot to attack, because the scene in front of them was too terrible and shocking.

The killing of hot weapons was simply terrifying, and those mutants who rushed over exploded in a large area of blood mist where the ten tracers walked by, a red mist composed of the blood of mutants.

However, with only five sentry guns, there are still a lot of firepower gaps.

On the wall, after Cai Ruichen saw the power of the sentry cannon, the moment his heart relaxed slightly, a second-level mutant with unusually slender legs dodged the attack of the sentry cannon, and at a distance of thirty or forty meters from the wall, he jumped suddenly, and pounced towards Cai Ruichen with a fierce face. (To be continued......)