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In the darkness, the "boom" sound was like a galloping horse, and it was like an unstoppable torrent.

There was a burst of machine gun sounds, and several zombie scouts who had been hiding behind a bush were killed.

And with the help of the fire sprayed from the muzzle of the machine gun, you can see clearly that it turned out that it was the two tank brigades of the Steel Fortress, which suddenly killed from the rear of the zombie position! The zombie scouts hiding in the bushes were spotted by the infrared reconnaissance equipment on the tank.

They are the troops that Chen Yuan and they hid before.

"Turn on the lights and go full speed!"

Inside a combat vehicle, Liu Changxing, the commander of the 1st Tank Brigade, ordered.

They came all the way before, and they didn't turn on the lights and moved forward in the dark, otherwise they would be discovered by zombies all the way.

And now even if the scout of the zombies is eliminated, the corpse king should already know. Because before this, Liu Changxing and the others had secretly eliminated a zombie's scout unit with a sniper rifle 5 kilometers away, which had already aroused the suspicion of the zombies. So there is no need to hide anymore and start full speed ahead.

Two or three kilometers away, and on the plains, the tank troops advanced at full speed, and it only took three minutes.

The two tank brigades, with nearly 1,200 combat vehicles, were already like a rolling torrent, rushing to the zombie position with unstoppable power.

In the process, although some zombies rushed to the ground, trying to stop the attack of the tank units of the Self-Salvation Army.

However, the main force of the zombie army is still engaged with the defenders of the Iron Castle in front, and the rear is empty.

Although the remaining 300,000 is not a small amount, the distribution is too scattered. On the encirclement that is 30 kilometers long and 2 kilometers wide, 300,000 zombies are on average, which is really not much.

And they seem to be moving underground, so it's hard to concentrate too many forces here for a while.

Coupled with the restrictions of the tunnel entrances, the zombies rushed to the ground one after another.

In the face of a torrent of steel with 1,200 tanks, such resistance is completely like a mantis arm.

With a single charge, the tank group crushed these zombies blocking in front of them under the wheels.

So the tank troops quickly occupied a zombie position.

However, it is only the outer area of the zombie position, after all, the depth of the entire zombie position can be 2 kilometers thick.

And it was densely packed with trenches crisscrossing it.

If the tank drives in, it is easy to get stuck, and then it will be troublesome.

So when he got here, Liu Changxing ordered the tank troops to stop advancing.

But the machine gunners and gunners on the tanks were ordered to continue to attack the zombies that were rushing to the ground one after another on the front positions.

In fact, if the zombies pay careful attention, they may find that the tank unit of the self-rescue army is not only tanks, but also a small number of armored personnel carriers.

At this time, these armored personnel carriers have already opened their doors.

Groups of soldiers quickly got out of the car.

Most of them look normal. The same is equipped with new assault rifles and light and heavy machine guns. As soon as he got out of the car, he launched a fierce attack on the scattered zombies around him, clearing the target.

But in every team of soldiers, there is a soldier with strange equipment on his back.

Under the cover of other soldiers around them, they quickly came to the underground entrances of the zombie camps, and pointed a handful of strange guns at these underground entrances.

Immediately afterward, I saw a series of fire dragons quickly erupt from these strange muzzles and rush straight into the ground.

It turned out that what these soldiers were carrying was a flamethrower!

And with the power of these flamethrowers.

The entire underground passage of the zombie camp was instantly filled with scorching flames.

Countless zombies who were rushing from all over the underground to support were immediately engulfed by the gushing flames! Instantly ignited by the flames of high temperature.

In addition, the effective attack range of these flamethrowers was only forty or fifty meters.

But in the narrow underground passages, the flamethrower's attack range is multiplied.

As far as the eye can see, on the zombie position at this time, tongues of fire are constantly erupting from the ground in front, and the farthest is even two hundred meters away.

And immediately afterwards, a large number of zombies with fire on their bodies crawled out of the ground, constantly rolling on the ground, but they couldn't extinguish the fire on their bodies until they were finally burned to death!

It can be said that the flamethrower of the self-rescue army is devastating to the underground zombies.

Wherever the flames passed, none of the zombies were spared.

When the fire was extinguished, all that was left was a tunnel that had been scorched by the flames, and all the zombies were charred.

At least tens of thousands of zombies are buried in a sea of fire!

This immediately frightened the Corpse King.

You must know that this is nearly half of the zombies left behind on this position!

What's more dangerous is what to do with the remaining half of the zombies?

It's really troublesome for the zombies underground to be transferred to the ground temporarily.

The narrow passages and entrances greatly limit their movement speed, and the human flamethrowers on the ground have begun to push forward.

So at this moment, letting the zombies hide underground is simply a cocoon!

The Corpse King could only hurriedly control the zombies to dig up the tunnels halfway down the road to stop the flames from continuing to advance underground.

On the other side, the main force that was attacking the Iron Fortress in front of it also urgently retreated and rushed back to support.

It was around 11:40 p.m.

The human troops on the city wall took advantage of the situation to attack and killed many zombies in one fell swoop.

On the side of the zombie position, Liu Changxing immediately ran away with his troops after learning that the main force of the zombies had begun to come to help!

In the face of the high-speed mobility of the tank units of the self-rescue army, ordinary zombies can't even catch up with them.

Originally, the Corpse King was still thinking of continuing to attack the Iron Keep.

But as soon as the tank brigade of the Self-Salvation Army turned around, it approached the other positions of the zombies.

Immediately blew up the corpse king! Hurriedly transferred the main zombie force back.

So the fourth attack basically came to an end.

The Corpse King will no longer attack the Iron Ciep until he is ready.

At this time, the strength of zombies has dropped from the original 1.5 million to 1.4 million.

In just an hour and a half, the zombies threw 90,000 corpses under the walls of the Iron Castle, and another 10,000 were burned to death in their own positions!

Then, the time entered the fifth day.

That night, also around 10 o'clock, the zombie horde, after getting ready, launched a new round of attack on the Iron Castle again.

This time the zombie troops attacking the Iron Citadel for the fifth time, the Corpse King is also preparing to dispatch 1.2 million.

Because last night's attack was fruitful in the eyes of the Corpse King, it was only more than 1 hour, and there were already zombies rushing up the human wall.

It felt that if it hadn't been for an unexpected attack on its own position, it would have had to abandon the attack halfway.

Maybe they've already taken down the Iron Keep.

And tonight, it's fully prepared.

It's just that it didn't know that in the command center of the Steel Castle at this time, a meteorological expert was reporting to Chen Yuan that something was not good news for zombies...... 2k reading web