The wall was really effective. A wall that could not even withstand a single blow from the D2 zombies was a curse that normal zombies would not be able to overcome. No matter how thin the wall was, it was able to block the zombies. The dark mass of zombies in front of the wall was like a blocked tide. The surging tide had to withstand the intense crossfire from both sides of the mountain. Under the net of fire, the tide of zombies continued to create messy waves. These waves were formed by the broken limbs and dismembered corpses that had been blasted by the machine guns.
The machine guns did not have much of an effect on the tide of zombies. Looking down from the top of the mountain, one could see that the zombies were constantly being blasted into pieces. However, the tide was surging. Every time there was a pause, it would be made up by the tide behind. The wall in front of the zombies prevented the zombies from advancing an inch. The huge pressure from the zombies continued to collide against the wall. It was as if as long as the zombies were blocked behind the wall, they would never have the chance to cross.
This was also an illusion. Suddenly, hundreds of S-Types jumped out from the tide of zombies. These zombies were climbing at the top of the tide of zombies. They were not eye-catching in the midst of the dark mass of zombies. Only after the zombies had jumped over the wall did someone react. They used heavy machine guns to tear these evolved zombies apart. However, their efforts were too late.
The S-Type zombies jumping over the wall was a test by the Z2 zombies. The zombies that were squeezed behind the wall fell down like a wave, allowing the zombies behind to stack on top of them. The zombie tide that had suffered countless attacks at the back also started to rise up, causing the zombie tide to rise up like a wave. This was because the dead zombies were used as the foundation to raise the zombie tide above the ground. Even if the Z2 zombies did not discover the secret behind the wall, it would not take long for the gradually rising mountain of corpses to send countless zombies over the wall.
At this time, the zombie tide had already broken through. There was no longer anything that could stop the zombies from breaking through the wall. When the zombies at the bottom of the wall formed a slope, the wall finally became a passageway. The last barrier was finally broken through.
The last barrier was only relatively speaking. Behind the wall, there were also many parapets surrounded by sandbags. However, these parapets were nothing to the zombies. The only thing that could stop the zombie tide was the heavy firepower from both sides.
In the face of the endless tide of zombies, even these heavy firepower with great lethality seemed to be insufficient. The terrain of the valley was much narrower than the road at the foot of the mountain outside. The zombies were crowded here and couldn't move freely. A random large caliber bullet or a machine gun could shoot down a large number of zombies, but this was far from enough. The zombies could never be completely killed. After killing one, there would immediately be a group behind it. The whole valley was filled with chaotic streams of light and spitting tongues of fire.
When the vanguard of zombies finally broke through the obstacles and reached the ground base in the valley, it was exactly ten hours later. In ten hours, millions of bullets were sprayed in the valley. The tide of zombies in the valley had already connected and the terrain had also changed. The highest part of the corpse mountain had reached four to five meters. Moreover, there was not only one corpse mountain. Many of the corpse mountains were connected together, like undulating hills.
The ten hours of fighting was a trial for the soldiers who were fighting the zombies. It was a kind of torture that made them feel despair. The zombies could never be completely killed, but their bodies would become tired. The high tension for a long time made them fall into a state of madness. This state could not be maintained for too long. Once this state subsided, they would feel double the fatigue and pressure.
When the gun barrel ridges were ground flat and the spare gun barrels were starting to run out, the fingers of the soldiers who pulled the trigger became swollen. When they fired the machine guns, the recoil they endured made most of their upper bodies numb and unable to feel anything. There was also a large amount of ammunition consumed. Each heavy machine gun had twenty thousand rounds of ammunition in reserve. Including a few gun barrels, they could finish firing before the machine guns were damaged.
But twenty thousand bullets was not so easy to fire. In the end, all the machine gunners felt like they had turned into zombies. They could no longer feel anything, whether it was pain or itch.
The rocket launchers and riflemen were also having a hard time. The rocket launchers were on high alert, looking for the most worthy targets. The zombies below were of different colors. They had to find the D2 zombies that were mixed in the middle and kill them as soon as possible. At short distances, the rocket launchers were the only effective weapon that could kill the D2 zombies. This caused them to be dazzled by the countless zombies. In the end, everything they saw was a double image. They were so dizzy that they couldn't even tell the difference between north, south, east, and west. There were even some people who were injured by the rocket launchers.
The entire valley was filled with zombies. The zombies had enough experience in dealing with fire. No matter how fierce the fire was at the beginning, it would always be extinguished by the swarm of zombies. The aerial photography in the sky had been affected. There was smoke everywhere and scattered ashes in the air. The visibility was very low. If the aircraft wanted to take a clear shot, they had to risk crashing into the valley. No one knew how many zombies had died in the valley and outside the valley. Zhang Xiaoqiang also didn't know how many zombies had been killed so far. He only knew that the zombies rolling down the mountain had lasted for many hours. Towards the end, the speed of the zombies rolling down the mountain began to slow down. It wasn't that the number of zombies wasn't enough, but the zombies had already filled the entire valley. The entrance of the valley was filled with zombies, and the mountain of corpses had reached a height of nearly twenty meters. The thing that caused the most damage to the zombies was not the firepower of the camp, but the impact of the countless zombies rolling down the mountain. At one point, the zombies at the foot of the mountain had lost more than the zombies at the front, making it impossible for the zombies at the back to have a place to stand.
On top of the mountain, the zombies were still continuously replenishing the corpse tide below. Even more zombies were climbing up the slope. The endless sea of zombies at the foot of the mountain was still dense and boundless. However, through the surveillance screen of the drone, Zhang Xiaoqiang had already seen the distant horizon. There was a patch of black yellow land that had been moved away.
This was the tenth hour since the start of the battle. Originally, it was set to be eight hours, but who would have thought that after eight hours, the zombies could still be controlled. The zombies outside the valley would never be able to enter the valley road in the first place. The soldiers on both sides of the mountain had already used up all of their heavy weapons ammunition. All of them were holding their rifles and shooting at the zombies. As for the zombies, because the entrance of the valley was narrow, they could only silently endure the target shooting at the top of the mountain.
After they had even used up all of their rifle ammunition, many of them stayed on the somewhat hot position and looked at the zombies below. They did not run nor shout because the order to retreat had not been issued. They did not know that the position at the top of the mountain was far less important than the higher-ups thought. Until now, the entrance of the valley was piled up with countless corpses. The corpses were all trampled under the feet of the zombies, causing the distance between the zombies and the position to be no more than ten meters. The zombies that were closer to the position did not cause them to be as afraid as before. Every soldier had 500 rounds of ammunition, but they had not only used up 500 rounds of ammunition. Adding the various weapons they were equipped with, each of them had at least killed tens to hundreds of zombies. The highest one had killed at least 200 zombies, and most of them were evolved zombies.
The soldiers on the top of the mountain had used up all of their bullets and drank all of their water. They were like statues standing on the top of the mountain looking at the zombies below them rushing into the base. At this moment, everyone was tired but calm. The officer did not have to deliberately guard against deserters. The soldiers had transformed in the ten hours of battle. The officer was the same. He did not give the order to retreat. He just stood there and stared blankly at the zombies rushing into the valley. There was still a steady stream of zombies rolling down from the top of the mountain ….
In the fortifications of the valley, thousands of soldiers were checking their equipment and maintaining their weapons. The endless stream of zombies broke through the layers of defense and arrived at the final battlefield. It was a wide valley with a radius of seven to eight kilometers. The zombies that poured into the valley were like drops of ink dripping into a pool of water. They followed the front of the corpse tide and slowly dispersed. However, the black tide was too long. Although the vanguard zombies had occupied as much of the ground as possible, it was still not enough in such a wide area.