The mother zombie is crazy, and the zombies under its command are all crazy, and the torrent of zombie armies is desperately impacting the team's defense line. Forced by the threat of death, the members have improved both the accuracy of shooting and the speed of reloading. One is an army of zombies who are not afraid of death, and the other is a desperate resistance forced by threats.

"Boss, retreat immediately, come back to the base, the base is almost unbearable!" Xue Peng's anxious voice sounded in Liu Long's ears.

"All members, alternately cover the retreat!" Seeing that the defense line was already close to a hundred meters in front of the formation, Liu Long reluctantly ordered a retreat and entered the gate passage of the base with the team of intelligent robot people.

As soon as the order to retreat was executed, the firepower to stop the zombies began to slowly weaken. Xue Peng on the city wall also ignored the zombies who attacked the city wall, and fully supported Liu Long's retreat. For a while, the intensity of artillery fire increased sharply by three points, which made the zombies' momentum against Liu Long's troops stop.

The zombie mother body soon discovered the movement of Liu Long's retreat, and her body began to shake again. The forbidden army in the zombie group appeared, and the zombie forbidden army composed of nearly two thousand second-level zombies set off, and this group of second-level zombies was mixed in the torrent of corpses and quietly approached the retreating troops.

"Let's go! Don't block it anymore! Li Jianlin's voice sounded in Zhang Jun's ears through the headset.

Zhang Jun immediately ordered the covering troops and fired the grenades in the gun. Then he turned around and ran with the last two rows of soldiers, and by this time most of the team had already entered the base.

The blockade of the queue disappeared, and the zombie group immediately broke through the 100-meter defense line, and the artillery fire on the city wall could not stop the huge torrent of zombies at all. The zombies with orange-red light in their eyes also began to accelerate abruptly, the speed of ordinary zombies at 100 meters was about fifteen seconds at most, while the second-level zombies only needed five seconds. In other words, if it is just an ordinary zombie chasing, the explosive power of human beings is better than that of zombies, but if it is a second-level zombie, the speed of human beings is still too slow.

The second-level zombies quickly came to the front of the zombie army, but no matter how fast they were, they saw that the retreating group of people was less than twenty meters away from the gate of the base. This group of second-level zombies raised their right hands and threw them forward vigorously, and then quickly repeated the action just now with their left hand. The retreating Liu Long army, no one noticed their arrival at all, let alone their movements.

According to the grenade firing method of Liu Long's troops, the zombie mother organized this long-range attack projectile team composed of second-level zombies. From iron to bricks, there is everything you can pick up. When it was discovered that Liu Long's team had begun to retreat, the zombie mother sent these second-level zombies into the corpse tide, and finally arrived when Liu Long's team was about to complete the retreat.

"What's that?" Li Jianlin, who was covering the retreat of the team at the gate of the base, suddenly heard the sound of breaking the air from the direction of the corpse tide, and he didn't have time to make any reaction, and all kinds of hard objects came one after another. A black object grew bigger and bigger in Li Jianlin's gaze, directly opening a hole in his head, and he heard several screams of members before he fell unconscious.

'Crackling' was like rain, and countless bricks, iron, and stones fell from the sky. The strength of the zombies is very strong, so these debris are projectile very high, drawing a very graceful parabola in the air, falling from the sky against the retreating team, and most of the retreating members were thrown to the ground without even screaming. Most of the debris fell on the heads of the members, and the light ones fainted directly, and the heavy ones were stoned to death on the spot.

There were only four hundred members in the two rows of retreat, and with the addition of two hundred members covering the retreat, only thirty or forty people in the six-hundred-strong group could still stand. The front door of the base was covered with bloodied members, and some of them were lying on the ground after being hit, and the wounds on their heads were smashed, gushing blood out like small fountains. More members were smashed in the head on the spot, and more than 500 people were covered in the floor.

The members in the passage of the gate of the base fortunately escaped the catastrophe, and the people who reacted immediately rushed out, carrying the members who might still be alive and retreating into the passage.

"Close! Close the door! Liu Long heard the anxious roar of the members in his ears, and the outer gate of the base began to close. Standing in the base, Liu Long saw that the members who were carried back from the passage of the gate one by one were all covered with blood, and most of them were unconscious.

"What's the situation? What about people? Where have all the people gone? Liu Long directly began to ask the people around him! Everywhere there were doctors treating the wounded, and the ground was full of wounded people dragged back by the response team, and only forty or fifty of the more than 500 people were carried back.

The gate of the base is completely surrounded by zombies, and since most of the members are all on the northwest wall, there is not much external resistance here.

"Boss, Captain Li Jianlin is in a coma, Captain Zhang Jun is rescuing, we met 。。。。。。" This member was reporting to Liu Long, and halfway through the report, suddenly this member's head was smashed by a falling stone, and blood and brain pulp splashed directly on Liu Long's face. Although he didn't listen to the words of the finisher, Liu Long already knew what they had encountered!

"Cover the retreat!" Liu Long loudly ordered the surrounding members to stay away from the area at the entrance of the base, and gave an order to save people to the intelligent robot through the system. After receiving the command, the robot ran to the base with the nearest injured person in its arms.

'Whoosh! Countless stones crossed the towering walls and landed directly on the base. Everyone didn't expect that the zombies would have a second attack, because everyone was too anxious, everyone was on the spot to rescue the injured, and suddenly a large piece fell again. There were members fleeing in all directions, and the corpses of members were strewn all over the ground. There were a number of retreating players who were hit by rocks and fell to the ground. Many of the wounded who had just been carried back were attacked twice, and even some of them were smashed into a blur of flesh and blood, and the blood in front of the base gate spread wantonly.

"Stop the zombies outside from the city walls and kill them for me!" Under the cover of the robot, Liu Long entered the inside of the city wall. Looking at the wounded in the passage of the city wall, as well as the corpses of the members in the place near the gate of the base, Liu Long angrily ordered to all the heat.

Of the 1,000 people Liu Long brought out, less than 200 were left to fight. When everyone started killing the zombies outside at the shooting port, they found that most of the zombies had retreated, and the zombies had taken all the humans with them except for the blood all over the ground.

"Boss! The zombies have retreated! A member of the team came to Liu Long's side and reported to him. As if he hadn't heard, Liu Long sat on the ammunition box in the passage, bowing his head and being silent for a long time.

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ps：

Thank you for the reward of 'a cup of bubble coffee' and the reward of 'Raindrop Hour'. Thank you very much for your support, Xiao Wei will continue to work hard.