If he gets close to the tank, it will be a nightmare for the tank, and it will be a nightmare for the first to drive.

Because if you get close, the tank can't fight against the level 5 zombies, and in terms of strength, the level 5 zombies are basically not much weaker than the tank, or even stronger than the tank.

In addition, the activity ability of the tank cannot be compared with the level 5 zombies, although the level 5 zombies may not be as fast as the tank, but when it comes to close range, the activity ability of the tank is not as good as the level 5 zombies.

The most important thing is that the tank is a heavy armor, and his headset ability is basically all long-range combat, and for close combat, the tank can only rely on that armor.

When the armor loses its effect, then the force of the tank is almost equal to zero, which Zhang Kaiyuan knows in his heart, so the tank has become one of his fastest retreating targets.

And those living forces also retreated with the tank, but when Zhang Kaiyuan retreated, he made two mistakes, the first mistake was to remove the tank, and the second mistake was to be too confident in the striking ability of the smoothbore gun.

He blindly believed in the firepower in his hand, and with the idea of preserving his strength, he actually did not carry out a devastating blow to this fifth-level zombie in advance, which laid a great disaster for his later defense plan.

\"Whoa! \"

Just as the tank was retreating, a sudden roar came from the hillside, and at the same time, the voice of the team defending the hillside was heard from the walkie-talkie.

"Squadron Leader! The western slope has been completely breached, and the eastern slope is still holding on, I believe that in the near future, it will also be breached, the zombie attack is too fierce, we have some parries that we can't resist\"

After hearing the voice from the walkie-talkie, Zhang Kaiyuan suddenly became a little annoyed, he grabbed the walkie-talkie in the hand of the company commander standing beside him, and yelled inside:

\"Who told you to defend? Didn't I already say it, let all of you retreat! The zombies have begun a full-scale attack, and the people on the hillside have given priority to retreating, retreating behind the first chest, don't you understand such a simple order? Fall back! \"

After Zhang Kaiyuan finished speaking, a few words that almost came out of his chest made the team members listening to his orders on the other end of the walkie-talkie almost deaf their ears, and even the soldiers who were defending and fighting around could hear Zhang Kaiyuan's roar.

The company commander next to him was even more discolored, after all, as an evolutionary close to the fifth level, the voice that came out after Zhang Kaiyuan was almost with a shock wave amplitude, and the shock wave spread through the air to the surroundings, although it had been deliberately converged and breathed, but when the last sentence came out, Zhang Kaiyuan still had some unrestrained feelings.

In this situation, the people around him were affected by his shock wave, and they all had some 300-eyed trends, and at this time, Zhang Kaiyuan also realized the mistake he had made, and he hurriedly let him be shocked by his breath, and quickly evacuated the defensive position.

These people are basically soldiers with ordinary physiques, as ordinary physiques, they can't resist his breath, as for those veterans, members of the special operations legion, they are all battle-hardened, and they can still resist this shock wave.

Because this is often the case on the battlefield, over time, their bodies have become quite strong, and under the conditioning of some plant drinks, such as fragrant juices, they will have a certain conquering effect on their bodies.

Otherwise, it would not have made Cao Jiajia so eager to get this drink.

So these special combat soldiers can resist, but those soldiers really can't do it, you rely on these figures, their strong physique, Zhang Kaiyuan has the confidence to let these people stick to this position.

Just after Zhang Kaiyuan had fun, the defensive positions on both sides of the hillside, whether it was the soldiers or the members of the special operations legion, began to evacuate, the soldiers ran to the chest position, they passed the road on the hillside, although it was rugged, but they were still able to walk, at least they could avoid the attack of a large number of zombies, as for the members of the special combat legion, they rushed down directly and joined the battle below.

However, at this moment, the fifth-level zombie suddenly let out another roar, as if responding to the roar on the mountain, Zhang Kaiyuan could clearly see that on the hillside above her, countless second-level and fourth-level zombies stood on the hillside and looked towards the position of their defensive position,

A large caliber machine gun, aimed at the top of the hill at the same time, those are the large-caliber machine guns that infantry fighting vehicles are equipped with.

Without opening Kaiyuan's mouth, the large-caliber machine gun roared upward, and rows of scorching bullets launched an attack on the zombies on the hillside, and the moment the machine gun attacked, Zhang Kaiyuan could see that those zombies were like locusts swarming and rushing down from above.

A series of black, slender figures, like wind and clouds, rushed towards the bottom of the hillside.

Some zombies couldn't bear it directly, opened their arms, and jumped down directly, looking like they were already in a state of hunger and thirst, and the target of those zombies was Zhang Kaiyuan himself, who was in charge of commanding below.

Zhang Kaiyuan's eyebrows furrowed, and suddenly he felt a chill, you must know that zombies are creatures without intelligence, but from the beginning of the battle just now, until now, these zombies seem to have wisdom.

The zombies have not been able to break through their defenses, because they have strong firepower and solid tactical cooperation, under the combination of these two conditions, it is difficult for the zombies to attack.

And the attack tactics of the zombies in front of him actually pointed the finger at him, the commander, Zhang Kaiyuan suddenly felt a palpitation, if these zombies know how to cooperate tactically, and they are already tall enough to be able to hit him, the main general,

That means that the combat effectiveness of the zombies has been comprehensively improved, and these things cannot be looked at with ordinary eyes, if these zombies continue to grow, Gang Kaiyuan does not doubt that these zombies can even use weapons.

Although this is basically impossible, Zhang Kaiyuan still can't help but have a deeper fear of zombies in his heart.

This feeling is not limited to the battlefield in front of him, but more to expand his vision to the overall consideration, he silently recorded this change of zombies in his heart, and then ordered the infantry fighting vehicle to shoot intensively at the zombies rushing down from above,

All the other personnel began to retreat to the rear,