Because it was not the first time to fight zombies, the commander was prepared from the very beginning, and all the fighters in each brigade practiced alternate shooting.

A brigade of three thousand people was divided into three rows, one in the front, one in the center, and one in the rear.

The soldiers in the front row are prostrate on the ground, because the defense line is much higher than the flat bottom, so there is no need to worry about not being able to hit the zombies in front.

The fighters in the middle row are half-squatting, the fighters in the back row are standing, and the fighters in the three rows shoot at each other alternately, so you don't have to worry about being rushed up by zombies because of the gap of changing magazines, and you don't have to worry about accidentally injuring your teammates.

However, there are too many zombies, even if more than 200,000 soldiers keep shooting, they can't stop the zombies, and can only slow down the zombies' advance speed to a terrifying level.

If the original speed of the corpse tide was that of a rabbit, now the speed of the corpse tide is that of a turtle.

It is more than ten times slower than the previous advance, and without further progress, batches of zombies will be broken to minced meat.

Although the muscle strength of low-level zombies is much stronger than that of ordinary humans, they can only make one hole per bullet. But after hundreds of bullets hit them, they were still beaten into a sieve and torn into shredded flesh.

However, what is the most troublesome feature of zombies? Can't be killed! If you can't get a headshot, then even if you break your limbs, it's just useless to open holes in your body.

Therefore, even if the fighters have a lot of experience, at a distance of 200 meters, there are still a few people who can successfully hit the head of the zombie.

There is no way, one is that the distance is too far, and the other is that these guns made after the end of the world are lacking in accuracy in order to be mass-produced and shorten the time.

In fact, both Wang Hao and the commander know that flames are a very good way to attack zombies.

Ordinary zombies don't feel pain, so they don't react to flames, and even if they are burned, they don't have any special reactions.

When piles of zombies gather together, the flames spread and cause more damage.

Although the fire could not spread further due to various reasons, such as clotted blood melting, friction caused by strenuous exercise, overcrowding and lack of adequate oxygen support, etc., the fire could not spread further, but it was very efficient.

But not anymore, there are too many zombies, and there is very little gasoline to ignite, or even none.

In the gas stations in abandoned cities, the gasoline in the underground storage tanks is almost all volatilized or pumped away.

It is even more difficult to get a lot of gasoline, and the cost performance is too low. So Wang Hao had to give up the way of fire attack.

The speed of the corpse tide was curbed by a large number of firearms, and the corpse tide could run a few meters per second, but now, it took more than ten seconds for the corpse tide to advance every meter.

The distance of 200 meters between the corpse tide and the first line of defense suddenly became a meat grinder, and countless zombies fearlessly rushed in, and then were hit on the head by bullets and pounced on the ground.

Then he was trampled under the ground by more zombies, and it went back and forth like this, and in less than ten minutes, a three-meter-high flesh and blood wall was piled up on the ground.

And this flesh wall is advancing at a slow pace, and as it advances, the height of the flesh wall slowly increases.

Time passed slowly, and the tide of corpses was getting closer and closer to the soldiers of the first line of defense.

After only half an hour, the corpse tide had advanced to the point where it was only fifty or sixty meters away from the defense line, and the efficiency at this time was also the highest.

If at a distance of 200 meters, the soldier's hit rate is 20 bullets to kill a zombie, then at a distance of 50 or 60 meters, basically three or two bullets can kill a zombie.

At this distance, the advance speed of the corpse tide was slowed down again, or rather, it was stagnant, and no matter how crazy the corpse tide roared, it could not break through.

"Da Da Da!" "Da Da Da!" "Da Da Da!"

Countless automatic rifles fired bullets in a rage, like dragons licking at the corpse tide, and the corpse tide was like a piece of ice, every time it was licked, it would melt a little, turn into blood and melt into the ground.

In the beginning, the blood could melt into the dirt and seep into the ground. But with the death of more and more zombies, even the width of the earth seems to be unable to accommodate it.

The commander standing on the makeshift lookout was excited to see the results so great, but he knew that this situation could not last long.

Sure enough, after only a few minutes, the advance speed of the corpse tide began to speed up again. There is no other reason, the number of bullets is not enough.

After waiting for a few more minutes, until the corpse tide was only more than thirty meters away from the first line of defense, the commander suddenly ordered: "Heavy fire coverage!" The others quickly retreated to the next line of defense. ”

Suddenly, some heavy weapons such as heavy machine guns began to let out a roar like a god of war, and the barrage of these heavy weapons tore the zombies to pieces like scissors cutting paper.

All kinds of stumps, severed arms and colorful internal organs flew everywhere, blocking the progress of the corpse tide, and the corpses of zombies piled up higher and higher.

However, although the effect of these heavy weapons is very good, there are not many of them, because the Tsu base can't make heavy weapons at all, and these are all leftovers from the past.

There are not many of them, and they can only be used to cover the retreat, otherwise after a long time, it is guaranteed that these heavy weapons will be dumb.

The already tired fighters immediately came out of their frenzy, picked up their guns, carried ammunition boxes and ran to military trucks and personnel carriers, and quickly retreated.

At this time, although the suppression of ordinary automatic rifles was lost, the tide of corpses was rapidly approaching the defensive line, but because heavy weapons such as heavy machine guns were erected on the car, they kept firing.

In addition, there was a defensive line more than two meters high, so all the fighters evacuated the defensive line safe and sound, and went to the second line of defense.

...

Another hour passed, and Wang Hao, who was standing on the city wall, could already see the tide of corpses in the distance even if he didn't use a telescope.

This means that the zombie tide has broken through the second line of defense, and then marches to the last line of defense, which is the city wall.

Two lines of defense, enough to eliminate more than three million low-level zombies, everyone who heard the news was cheering, only a few people in the know, showing a bitter smile that was not easy to detect.

Because of the number of more than three million, it only accounts for one-third of the entire number of corpses, and the most important thing is that basically none of the middle and high-level zombies have been eliminated.

The corpse tide that broke through the second line of defense traveled very fast, and quickly marched towards the base of Tsu City.