The three forces are in the city, fighting their own battles, cleaning up the scattered Zerg who came to explore the surrounding area.

Relatively speaking, Chu Feng's side and the guard army side are from the military alliance and have a certain tacit understanding, but a group of space fighters has no tacit understanding at all, and not every star soldier has a sense of justice, and there is never a shortage of troublemakers.

As long as this kind of bastard makes trouble in the area where Chu Feng is stationed, he will give an order and kill him with military discipline. Of course, at first, it aroused the anger of the slain's companions, but Chu Feng killed the most violent people among their companions, and the world was immediately quiet.

In extraordinary times, killing a few bastards immediately played a role in killing chickens and monkeys, and it could stabilize the nervous mood of a group of recruits, so why not!

The area in charge of Chu Feng stabilized, and began to order the people here to build a defense base, the people here are not ordinary people on the home planet, ninety percent are all kinds of engineers, otherwise how did such a steel fortress come about?

As for the lack of materials at all, each city has a reserve of strategic resources underground, and the city is a part of the steel fortress, which is naturally connected to the core machinery of the fortress, as long as the engineer adds defense equipment or attack equipment, it can be used immediately.

The city began to consolidate its multiple defenses, and layers of heavy steel and iron plates, under the control of hundreds of mechanical tentacles, were built around the city like building blocks.

Within an hour of construction, a metal wall of more than 100 meters was formed around the perimeter of the city, and at the beginning there was a small metal fortress on the scale.

Taking advantage of the fact that the city was in a safe period, Chu Feng seized the time to recover the strength consumed by the previous battle with Qin Leilong.

Shortly after an hour had passed, there was a loud 'buzzing' sound in the sky, covering it from a distance, and a dense noise was escalating, as if something was flying towards it at high speed.

"Attention all! Zerg Air Force! Coming in five minutes! ”

"Attention all! Zerg Air Force! Coming in five minutes! ”

The announcements of the guards continued to sound in every corner of the city, and at the same time, a group of engineers suspended the construction of defenses, and activated the defense equipment and armed equipment throughout the city, and the logistics engineers who were originally in charge became a backup force.

The Steel Fortress is their home, and of course they are desperate to protect this inheritance, they are not like the wandering Space Marines, in the face of such an alien invasion, none of them flinched, and did their best to exert their due strength.

In fact, in every military planet of the Human Alliance, the people have a strong will, firstly, under the influence of the general environment, secondly, the people have attachment to the planet, and thirdly, not everyone can live on the military planet.

They can live down, which is equivalent to the elite of ordinary people, and they have their own pride, such as physical fitness, intelligence, spirituality, etc., which are far superior to the humans of ordinary planets. ”

To put it simply, the military planet is a first-tier city, and the other planets are second- and third-tier, like the home planet, which is considered a rural place.

With the help of all the city's engineers, the city was instantly transformed into an impregnable fortress.

Chu Feng ended the recovery of his body, came to the area where the troops were stationed for the first time, climbed the highest steel wall, looked around, and suddenly saw a large area of dense, black and dreary, like an endless black night, covering the sky and the sun, just seeing such an amazing number of zergs, it was terrifying, and he couldn't give birth to the slightest idea of victory.

This group of flying insects that cover the sky and the sun are like locusts, with their upper and lower jaws as hard as metal, and they have extremely strong chewing teeth, and saliva can decompose energy, bite and chew all matter.

Suddenly, the huge and dense insect army split into five groups and flew in different directions.

"They're not exactly coming at us."

Chu Feng guessed that these five flying insect armies might go to the surrounding cities, and once a city was breached, this insect army would gather together and continue to break through the next city.

The first is to disperse the impact, and then integrate the cities with the strongest defenses.

It is estimated that the Flying Bug Army is only the vanguard force, and is only responsible for breaking through the city's defenses, and the real battle is likely to be from the war bugs on land. And with such an army of zergs coming, it can be determined that there are intelligent brain worms.

Thinking of this, Chu Feng ordered a preemptive strike, at the expense of energy, giving up the steady and continuous output, condensing the firepower of the entire area at one time, implementing a covering explosion, and using the strongest firepower to blast away a black flying insect in the sky!

Only by destroying the flying insects can we have the spare strength to deal with the surprise attack of the war insects behind!

After receiving the order, 1,000 subordinates immediately carried it out.

In Chu Feng's area, the first of the strongest thickened main guns blasted out, and then one by one the buildings turned into mechanical turrets, countless blazing beams of light cut through the air, blooming into a dense brilliance like a torrential rain, and exploded a continuous and fierce explosion, as if it was connected into a crack that tore through the sky!

A large number of flying insects fell down one by one like burnt dumplings, but the next moment, the flying insects spread out into a fan, gushing out a stream of green corrosive acid mist, rolling and swinging, forming layers of corrosive protective films, attacking the past energy beams, and greatly reducing the lethality.

"Switch physical bombs!"

Chu Feng did not set off to fight, standing at the forefront and giving orders.

Physical bullets are non-energy beams, which are all kinds of warheads, such as reinforced alloy warheads, crystalline warheads, mechanical warheads, etc., which are specially used to break energy and restrain energy.

Boom! Boom! Boom! ――

There was a loud vibration of metal cracking, as if it had pierced through layers of space, and directly hit a green acid mist in the sky, and suddenly the warhead exploded a large number of broken steel balls, which immediately penetrated the corrosive layer of the acid mist from the inside.

There was a scream, and one after another bullets shot in, and large swaths of frozen cold air, condensed corrosive acid mist, turned into pieces of dark green hail, and fell down with a bang.

"Toggle Energy Attack."

Chu Feng gave orders indifferently, and each command played a key role.

Under the explosion of several waves of physical bombs, the acid mist in the sky quickly weakened, but the killing range of physical bombs is limited, and it is impossible to annihilate a large number of flying insects at one time on a large scale, and even with such a low killing effect, flying insects can directly kill in front of them.

Even if all the ammunition is exhausted, it will be difficult to destroy three-tenths of the number of flying insects, and it will take time for the warhead to be loaded, making it difficult to attack for a long time. Therefore, the physical bomb only plays a role in destruction, and to really kill flying insects in a large area, it still depends on energy attacks.

At this time, Chu Feng switched his energy attack, taking into account various circumstances, and continued the offensive outbreak in a tight situation, so as to blast and annihilate the formation and number of flying insects to the greatest extent.

Switching attacks back and forth several times, the flying insects attacking in this direction were all shattered by artillery bombardment, and they were crushed. But the energy in this area of Chu Feng is almost exhausted, and it will take a while to buffer.

"One, two, three groups, drive the mecha to the front line to fight, and break them one by one."

"Four, five, or six groups, fly fighter planes, and constantly break up the formation of flying insects, don't let the flying insects gather together."

"Seven, eighty, and nine groups, driving heavy tanks and tanks, fully armed and stationed on the defensive line, ready at any time."

"Ten groups, release all the robots on the battleship, and provide long-range output on the ground."

Chu Feng issued orders one by one in an orderly manner, and the teams that received the orders were all in place and quickly executed.

He didn't leave any extra troops in the area where he was stationed, but that doesn't mean there is no counterattack here, don't forget whose city this is. This is the home of a group of fierce engineers or space marines, and the series of attacks just now are just the offensive of Chu Feng's side.

Chu Feng is fighting on the front line, and the engineers and space marines are defending in the rear, in short, there are two defense lines, if the defense line that Chu Feng is stationed is about to collapse, the engineers and space marines will immediately support.

Everyone's thoughts are different, Chu Feng thinks that eliminating the Zerg as soon as possible is the right way, but the people in this city, they think that occupying a favorable terrain will better fight back against the Zerg.

Indeed, in the second line of defense, there is a mechanical array of engineers, and the Zerg will have to pay at least a lot to break through.

But the number and weirdness of the Zerg must be much stronger than that of humans.

Once breached, the Zerg will be able to drive straight in, and at that point, the city will be breached.

Soon after, groups of recruits entered the skies for combat, and flying bugs kept falling.

The individual of the flying insect is not very large, only the size of a bull's head, and does not have too strong offensive means. And a mecha is more than ten meters tall, and with a single slash, it can kill at least ten flying insects, as long as the flying insects can't form a formation, then they can be killed at will.

In fact, flying insects are just a group of troops used to break through defenses, and they must rely on groups in order to show terrifying power.

The battle in the sky has entered a white heat, and the battles in other areas have also started, but other areas are not as easy as Chu Feng's area, they did not break up the formation of flying insects at the beginning, resulting in a large number of flying insects forming a corrosive acid mist, not only corroding the defense buildings, but also corroding the human battle armor, machinery, and mechas, making it difficult to burst out with the power it should have.

Chu Feng did not join the battle, swallowing one nutrient solution or life gene liquid after another, while recovering his strength and adjusting his state, he was waiting for the next wave of real invasion of the Zerg.

When the second wave of energy was about to be filled, a large-scale war insect appeared in the distance, not only a cannon fodder-level war bug, but also a general-level war bug, as well as a giant war bug the size of a battleship, and a war bug that released corrosive energy from a distance.

It is exactly the same as the regular army of human beings, if this is not a military planet, just an ordinary planet, there is absolutely no city that can withstand the impact of a wave of war bugs.

"Give up the battle above all and crush the army of war bugs on the ground."

Chu Feng stopped swallowing the nutrient liquid, his strength recovered thirty percent, he was armed with an alienated battle armor, and a teleportation flickered to the chariot tank, and said: "The melee robot turns on the charge mode, all the heavy chariots and tanks form a triangular battle formation to disperse the Zerg army on the opposite side, and the main gun of the battleship is aimed at the giant war worm - attack!" ”

At the sound of the order, the heavy tank let out a thunderous roar, and burst into a frenzy. At the same time, one by one, the robots covered layers of solid energy armor, like a sharp sharp diamond, launched a fierce charge!