After a scramble of guns, the exoskeleton man who landed behind the defense line was full of holes. After the shooting, he found that the exoskeleton man had long been dead and could not die again, and there was no need to repair the gun. However, no one thought he was nervous, but he took it for granted.

It seems very easy for the commando to eliminate the exoskeletons, but it not only takes advantage of the powerful equipment, but also because of the early contact between Ye Fei and others with the exoskeletons, they have a certain understanding of the exoskeletons. Otherwise, even if all the commando members are pulled to Mars, facing the enemy who cannot penetrate the bullet, they will only be beaten with their eyes and stare at them.

The Mars garrison is part of the army. Although it has an independent command system, it is still institutionally affiliated with the Earth's army and does not have any particularly surprising equipment. It cannot be compared with the commando team, or even with the troops on the earth!

The political environment of Mars is very simple, with only immigrants from the three major aerospace kingdoms. At the beginning of the development of Mars, the three countries signed a series of agreements, including clauses to restrict the Martian garrison. According to the agreement, the Martian garrison is not allowed to equip heavy land warfare weapons such as tanks, and the weight of armored vehicles is limited to less than ten tons, and self-propelled artillery...

No one had ever doubted the tripartite agreement at the beginning, but today, the army suffered a considerable loss in the battle with the exoskeletons. It was not the large-scale support of the commando team, and it was impossible to stabilize the defense line in such a short time. But even so, the pressure on each defense line also made the army commanders breathless.

The exoskeletons did not spread out on a large scale. After the airborne, except for a few individuals who fell in human cities, other exoskeletons quickly gathered into several groups to launch a large-scale offensive to nearby cities.

There are hundreds of large and small cities in China in the Mars colony, but they can be counted with ten fingers, and they are all super-large cities with a population of over 10 million.

If the number of troops garrisons was not proportional to the size of the city, it would be hard to say whether they could organize effective defenses in such a short time.

Fortunately, their eyes are staring at big cities. The number of troops in small and medium-sized cities is insufficient, so it is difficult to resist the large-scale attacks of exoskeletons. If a large number of small and medium-sized cities are slaughtered by exoskeletons, even if all invaders are eliminated, the military will not be able to explain to the people across the country.

The soldiers who "solved" the exoskeletons quickly returned to their defense, rushed to their respective battle positions, and kept pouring ammunition to the exoskeletons who were rushing in like a tide. The gunshots were no longer distinguished, and the sounds connected into a circle were like a tide. The smoke of gunpowder choked the soldiers to breathe difficult.

When the bullets were fired like a rainstorm, the outer bone man who rushed in the front often fell down. After being passed by the outer bone man behind, the outer bone man who fell to the ground got up again. Only a few guys who were extremely unlucky would be penetrated by the bullets of the blind cat hitting the dead mouse and died.

Ordinary soldiers still use 5.5mm ordinary bullets, which have very limited killing effects on external bones. They can only keep firing and cannot kill external bones. However, the impact force of the bullet is not fake. The strong inertia can at least offset the impact of external bones.

It is not that Mars is stingy, but that the natural environment formed by Mars through artificial transformation is very fragile. Any industry that has an impact on the environment is not allowed to be built on Mars. Therefore, the industrial foundation is far behind the Earth. Although the satellite factories on Phobos are running at full capacity, the time is too short, and the number of armor-piercing bombs produced is limited, so it is impossible to equip every soldier.

In addition, the satellite factory is also responsible for the production of other ammunition of various calibers, and it is impossible to use all production capacity for bullet production.

In order to improve combat effectiveness, all large-caliber weapons that can be found are distributed to soldiers without any delay, but they are far from being able to use one.

Therefore, for the Army, supporting firepower becomes a life-saving straw.

Before the arrival of air support, the artillery positions arranged behind the defense line became almost the backbone of everyone's hearts.

The fierce battle made Bai Ye look uneasy. A small radius with a high overload turned, and the fighter flew back, and two more missiles were fired out.

After repeated several times, except for the nuclear bombs in the main bomb bay, all the missiles were thrown away. Although there were machine guns, the missiles were killing surfaces and killing points, and the efficiency was not comparable.

Bai Ye was very anxious: "Undercurrent, I am Apprentice No. 12. The airborne weapons have been consumed. Where is the airport? I need to replenish ammunition!"

The F-440 can enter the atmosphere from the universe to fight, but it is impossible to leave the atmosphere and return to space by relying on the power of the fighter jet. It must rely on the support of ground airports and add rocket boosters that are longer than fighter jets to return to space.

"When the undercurrent is received, please go to coordinate XXX!" The trend responded immediately. Due to the timely support of the aviation force, the artillery was given a chance to breathe. The barrel had completed heat dissipation and could be reintroduced to the battle.

The fighter plane flew over the defense line, and red flags fell on the position, and dozens of artillery fires bloomed at the same time. With a loud bang, the shock waves from the muzzle rushed up layers of smoke and dust, and the shells roared into the outer bone man. Although the army in a defensive position could not charge at all, in order to achieve the blocking effect, the artillery still used barrage Xu Jin tactics. Looking down from the sky, the assault cluster of the outer bone man seemed to suddenly grow a neat row of flame trees, then another row, and another row...

I don't know how many external bones were blown into the sky by cannons, and their killing effect was far above the infantry rifles.

The fighter plane flew away from the defense line and left both sides far away.

If it is purely for support effects, the fleet in the universe is the best support platform. Just make a few asteroids of suitable size and throw them at the predetermined coordinates. It is quick and convenient, and it is cheap.

There were seven or eight fighter jets that arrived here with Bai Ye, basically all of them threw away their conventional missiles and everyone flew towards the airport together.

Just as the fleet had just left, Ye Fei arrived at the defense line in a landing craft that was much thicker and slower than the fighter plane. Ye Fei was impatient to contact the commander here: "The 21232 team was ordered to support him. Please answer when you hear it!"

"21232, I am Seullier. Please do your best to eliminate the enemies outside the city. End!" Seullier is the local supreme commander, but he is not familiar with the equipment and tactics of the commando team. Therefore, whether it is the commando team who landed here in the early stage or the troops that are subsequently supported, they only issue general orders, allowing the commando team to freely exert their combat effectiveness.

"I understand!" Ye Fei replied.

The landing craft did not fly to the defense line, but turned around to the densest area of ​​the outer bones. Several team members did not need to be greeted by him, and launched a slaughter in a tacit understanding. The rifle and machine gun were used to ruthlessly harvest the life of the outer bones like the sickle of the God of Death.

However, just by mechanical energy, Ye Fei never thought of using machine guns to clean up the external bones. The landing boat flew over the target. He immediately issued an order: "Drink gas bombs, throw them!"

The few people behind were stunned at the same time and were overjoyed. After taking off their waists, they smashed the grenades down. The black bear threw the machine gun aside, carrying a box of "poisonous gas grenades" in one hand, smashing them all in a row like a fun.

The height of the landing craft is not five hundred or four hundred and five. Grenades are thrown down at such a high ground. Before they fall to the ground, the poison gas begins to swell. Fortunately, the poison gas itself is slightly heavier than the air, and the poison in the grenade will not be completely consumed before it lands.

The outer bone man who was targeted by Ye Fei was considered unlucky. Wherever the grenade fell, it would knock it down, which was dozens of times better than the shells.

Biochemical weapons are known as the "atomic bomb of a poor country", which shows from one aspect that the cost-effectiveness and lethality of biochemical weapons, such as large-scale destruction weapons, are what they get when used on external bones.

All the soldiers who witnessed this were shocked by the effects of the nerve agent. If they had this, how could they have to be so hard to defend?

Ye Fei did not consider the direction of the wind at all, and poisonous clouds floated towards the human defense line, scaring the soldiers almost burst into trouble.

Where the poisonous clouds passed, the external bones fell down in pieces, not knowing life and death. The commander made a quick decision and ordered those with gas masks to put on them quickly, and those without them immediately retreated.

The soldiers were relieved and quickly evacuated the defense line.

Ye Fei heard the commander on the radio ordering to retreat and quickly remedy: "Undercurrent, undercurrent, that, this thing has no effect on people..."

"Ah?" The underworld was half-believing and half-doubted, "Is it true or false?"

This is nothing else, it is a nerve agent!

"Do I dare to joke about the lives of so many people?" Ye Fei was helpless. "This thing was developed for external bones and is not toxic to humans. At least for now, no side effects have been found."

The depression of the undercurrent was not lost. Good guy, he didn't say it earlier, but now is not the time to pursue the matter. He immediately issued an order to return to the defense line to the soldiers, and emphasized that the poison has no effect on people.

The soldiers were somewhat hesitant, but after the undercurrent appeared in the poison cloud without any protection, everyone was relieved and returned to the defense line.

But at this time, they were no longer in trouble. No outer bone man could still stand where the poisonous clouds floated.

The defense line underwater flow is the main attack direction of the exoskeleton, but the other directions are not without the exoskeleton. The landing craft is gradually moving away as the traces of the exoskeleton. The subsurface suddenly patted his forehead: "21232, are you throwing lethal poison or anesthetic gas?"

"It should be a lethal poison."

"What about the lethal dose?" asked undercurrent.

"Ah?" Ye Fei was stopped by him, "How could I know this!"

"Damn!" Qianliu cried with a sad face, "I understand, come here, rush out, and shoot one by one, don't pull down one by one!"

Damn it, too!

Ye Fei was shocked. This guy is really OK. If he dies, he will have another shot?

He could understand the idea of ​​undercurrent, because he was worried that the concentration of the poison was not enough, and that the external bones would just fall into a coma rather than die. However, even though the order was aimed at aliens, he still couldn't control the words "kill prisoners" and "borer abuse" and other words.

Undercurrent didn't have so many ideas. In the previous battle, his troops lost hundreds of soldiers, and the calculation was just right for the exoskeleton.

The moment the order was issued, the defense line was immediately empty. Countless soldiers who were as innocent as white paper rushed out of the trench yesterday, pressing the eyes of the outer bone man next to them to repair their guns. There were monotonous sounds on the battlefield one after another, and the gunshots echoed endlessly.

Ye Fei had killed one-third of the enemy until before. After the arrival of air support, the number rose to one-half. However, the fierce battle made the soldiers reach their limits, and no one could tell how long they could last.

The remaining half of the enemies had lost their momentum, and were killed by Ye Fei in one go. The landing craft was not a bomber, and the number of poison grenades carried was limited. Ye Fei only picked the places where the enemy was the most, but the effect was excellent, and the war was reversed.

There are still many unpoisoned exoskeletons on the battlefield, but the brains of the exoskeletons do not prevent them from having normal wisdom. As long as they know how to think, they must know what fear is. The remaining exoskeletons cannot understand what nerve agent is. When they see their companions fall for no reason, they are scared. The place where a large number of exoskeletons fall is like a watershed. The remaining exoskeletons dare not step beyond the line and avoid it from afar.

The thoughts of the outer bones are far less complicated than those of humans, so they feel much simpler than humans. They move forward bravely when they are not afraid, but once they start to be afraid, this kind of situation will be formed.

The soldiers who had replenished their guns gradually advanced from the inside out, and suddenly discovered the enemy who had escaped, and suddenly moved in and out of nowhere.

The underworld was also stunned. He moved forward, afraid that the outer bones would rush up again, but retreating would be equivalent to selling his back to the enemy. No matter how stupid the outer bones would rush up!

The landing craft had already flew far away, and the other directions were still fighting, so it was impossible to recruit the landing craft back. Both sides stared at each other for a moment and actually stood in a stalemate.

What to do? The subflow mind is transferred, but how could I come up with a solution for a while? At this moment, a call suddenly came from the radio station: "Underflow, I am Apprentice No. 12, please indicate the target!"

Damn, savior!

The undercurrent pounced on the radio in a dog-snatching shit, and quickly reported a string of coordinates. After saying that, he laughed loudly, his grandma's alien, see how you can fight me!

Bai Ye's fighter plane did not hang missiles, but carried a large number of bombs. Because it abandoned the heavy external armor, in addition to the built-in bullet cabin filled with bombs, the wings were also hanged with bombs.

The fighter plane flew over the defense line, causing the soldiers to cheer indulge indulge indulge indulge in the warriors. The outer bone man, who could no longer be described as sharp eyes, found that something was flying in the air again, and there was a commotion immediately.

From the perspective of humans, it is impossible to see if there are any officers or other positions among the exoskeletons, but the exoskeletons are always very strict. It was not until Bai Ye dropped a bomb that the gathered exoskeletons suddenly fled like frightened rabbits... and fled in dispersion.

The underworld wiped his face hard: "Damn it, fortunately the aliens did not have planes." None of the soldiers who heard this said nodded hard.

Although the exoskeleton began to escape, the undercurrent was worried that it was the exoskeleton's tactic of getting, and did not dare to order the soldiers to pursue it.

Missing one enemy is more important than destroying a hundred enemies; defending the defense line is more important than destroying the enemy!

———
Chapter completed!