The war has entered its fourth day, and the zombie attacks are becoming more and more fierce every time.

It was only less than 10 o'clock that night, and 1.2 million zombies launched a new round of attack on the Steel Fortress under the cover of a large number of artillery corpses and siege equipment.

Looking from the city wall, it seems that endless zombies are pouring in from all directions. It's like an ocean, and people can't see the edge at all.

All the human officers and soldiers on the city wall couldn't help but be solemn.

Because this is the first time they have faced the attack of so many zombies.

Even when the corpse king army in Zhangjiakou attacked Yangcheng, at most, there were only more than 800,000 zombies attacking at the same time.

However, at this time, Chen Yuan and the others already had a plan to deal with it.

Looking at the swarming zombie horde, Liu Jinlong asked Chen Yuan, "Fort Chief, is it time to inform Liu Changxing and Xia Yongqiang that they are dispatched?" ”

Chen Yuan smiled and said, "You can notify them first, but don't act in a hurry." Let the zombies fight first, and when we fight the zombies, it's not too late for them to act. ”

Qin Cheng also said: "Yes, I want to see how powerful these 1.2 million zombies are!" 1.2 million and 800,000, in fact, not much! ”

Wang Luzhou said with a smile: "You are a little bad at mathematics, half more!" That's not much. ”

Qin Cheng was full of confidence, and replied with a smile: "Even if it is doubled, aren't we afraid." Let them try! ”

Zhang Fatzi also smiled and said, "Yes! 800,000 can't attack our walls, and don't even think about 1.2 million! ”

*********

With the zombies charging, the big battle soon began.

Dense gunfire rang out again from the walls of the Iron Keep.

Countless bullets formed a dense network of fire around the entire steel fortress walls, trying their best to stop the zombies from advancing.

This time, the zombie attack is no longer limited to the east and west. Rather, it was launched simultaneously from all four sides of the Iron Castle.

The Corpse King seems to be trying to distract the human army.

This did have an effect.

The Iron Castle's own troops, plus the troops from Yangcheng, Shenwuguan Settlement, and Blackwater Settlement, although this time the total strength of the human alliance was 146,000.

But the Iron Castle is in the Northeast, and there is not only one Steel Castle to defend.

To the north, there are also the Fort of Hope, the Zhangjiaba Iron Ore Area and the Sky City, and to the west there are Gedaqi and the Hunting Ground Resource Point, all of which need to be defended by a certain amount of troops. Even Chen Yuan had secretly deployed a unit in the field before.

Therefore, the troops that actually stayed in the Steel Fort to defend were only about 102,000 people.

The day before, when the 800,000 zombie army attacked from the east and west, Chen Yuan and the others concentrated their main forces on the east and west. The firepower is relatively concentrated.

And today, the zombies are besieging from all directions at the same time, and the troops of the human alliance are naturally scattered.

The outer walls of the Iron Castle have a total length of about 16 kilometers.

Subtract the reserves, artillery units and engineering troops, maintenance units and other units that are not on the city walls, as well as attrition in the battles of the previous days.

On average, there are probably less than 5,000 people per kilometer of defense.

Naturally, this kind of firepower is much weaker than the day before.

But the same is true for zombies.

Although the ordinary zombies are still the same dense, there is no shortage of troops at all.

But the attack of the trebuchet and the cannon corpse was much weaker than the day before.

They had already been wiped out by human forces in the previous three days of fighting.

Now that all the walls covering the Iron Fortress were scattered, the firepower suddenly became a little thin.

Therefore, the human troops on the Iron Castle can defend and attack the zombies on the ground more calmly.

In this way, the battle seems to continue yesterday's fierceness. The zombies in the charge are still falling in rows, and every distance they advance has to pay a lot of price.

On the human side, in the face of a larger number of zombie bows and Molotov cocktail attacks, casualties are also constantly occurring.

In the evening, at 10:30, only half an hour after the attack was launched.

Liu Jinlong reported to Chen Yuan: "Fort Chief, on the east side, a small number of zombies have already rushed under the city wall. They are preparing to enter the city. ”

Chen Yuan asked, "Are there any hidden flying corpses found in the zombie group?" ”

This time, Liu Jinlong shook his head, smiled and replied, "No." It is estimated that the Corpse King also knows that the same tactic cannot be used against us twice in a row. ”

Zhang Fatzi also smiled: "And yesterday, the Corpse King used that trick to lose a lot." We killed 12 mutant zombies and about 3,000 strengthened species at once, and it is estimated that it is still in pain. I don't dare to do that anymore. ”

Liu Jinlong then said: "In addition, most of the flying corpses withdrew after dropping the zombies last night. But the loss is actually not small. During the day, I counted it. The bodies of about 1,200 flying corpses were found. Therefore, it is estimated that there should be no more than 2,000 flying corpses left in the zombie group now. ”

Chen Yuan smiled: "I hope they can give us another operation like this tonight." When the time comes, let them take care of their heads and tails, and easily kill all the enhanced zombies that rushed into the castle. But it's a pity. Since they were not fooled, then notify Liu Changxing and Xia Yongqiang to start their actions. ”

Liu Jinlong nodded: "It will take about 1 hour for them to come from a hidden location." It was almost just in time for the height of the battle. ”

So Liu Jinlong then went to convey the order.

At this time, under the walls of the Iron Castle, the battle was still raging.

As time passed, more and more zombies broke through the fire lines of the human forces and reached the walls of the Iron Keep.

Half an hour later, at least two-thirds of the walls of the Steel Castle had gathered a large number of zombies.

In some places, zombies are even on the verge of climbing the walls.

It's just that although it is only a short distance, it seems that it is not easy to rush up under the dense fire of the human troops on the city wall.

Ten minutes, at least ten minutes, the zombies finally rushed to the human wall after paying thousands of casualties.

And then there's the melee.

And in the next twenty minutes, there were dozens of other locations one after another, and zombies rushed to the walls of the Iron Castle.

However, just when the battle was at its most intense, the attacking zombie army suddenly appeared in a commotion.

Because at this very moment, to the west of the Iron Castle. Only two or three kilometers away from the rear of the zombie position, there was a sudden burst of dense "boom" sounds.

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