Before the aliens arrived on Earth, the war had begun.

The threat of asteroids to the Earth is obvious, and on the one hand, the military is making every effort to build repulsion ships to defend against asteroids in the starry sky, and on the other hand, strengthening the Earth's orbital defense system and trying to strengthen the terminal destruction capability.

The first step is to build a fleet of orbital laser satellites.

This is not a project of Xia Guo, nor is it the plan of any small partner, but an international cooperation plan, which is intended to build the strongest laser defense system to resist the invasion of aliens.

For this reason, all countries have come up with the technology of pressing the bottom of the box, and if they really can't get the technology or the technology is already backward, then they will send people to work, money and raw materials, in short, no one wants to stay out of the matter.

Yanjing has also invested heavily to provide abundant power directly through the wireless transmission network, so these satellites do not have the large-scale solar panels that traditional satellites have, they are just round satellites, floating in orbit very inconspicuous.

But don't underestimate the power of these satellites, each of which has an umbrella-shaped concave surface composed of dozens of laser launchers, which can destroy missiles in flight in a split second.

This is already the highest level that humans can do, or rather, laser cannons are the only suitable weapons in the human arsenal.

Other particle weapons either can't be built, or they are not practical, and they are not available on the table at all.

For the time being, it is not clear how much of a threat there is to alien warships, but if one cannon does not work, there will be five, if five guns do not work, ten guns, and if it can't, all laser satellites will be salvo together!

The light cannon defense system can not only defend against enemies when aliens are approaching, but also change the orbit of an asteroid if it illuminates an asteroid for a long time, which can be regarded as a line of defense against asteroids.

Not only is the light cannon group built on the track, but even the Luoshu Mountain has also built an optical cannon array on the moon, that is, thousands of laser cannons are neatly arranged to increase the range through salvo fire.

But although the range of this thing is long, it does not threaten the Earth's low-earth orbit, and can only be regarded as an insurance for the moon.

Moreover, the satellite is floating in orbit, the probability of survival in wartime is relatively high, and the light cannon array is placed on the surface of the moon, and the alien species only needs to give a cannon or smash an asteroid to destroy the artillery array that has been built so hard.

Therefore, Luoshipshan only built an artillery array, and abandoned this thankless plan.

In contrast, the plasma cannon is more powerful, but the range is too close, which is really not very easy to use.

However, the aliens have forced humans into a corner, and whether the range is close or not is no longer in the scope of consideration, and whether or not the alien spaceship can be destroyed is the key, so after the countries have built the light cannon defense system, they have carried out the plasma cannon defense system under Yan Jing's suggestion.

The problem of the firing range of the plasma cannon cannot be solved by the number of salvo accumulations, it is determined by the characteristics of the plasma itself.

In order to solve this problem, all the plasma cannons in orbit are disguised as asteroids...... Well, anyway, the enemy's asteroid is coming in August, and the right is to destroy the wreckage left by the asteroid.

The orbit and the moon are only a small part of the defense plan, and the defense system in the atmosphere is the main body of the terminal defense.

First of all, there are anti-aircraft missiles, which have been developed for the longest time, have the most mature technology, and have the highest reliability. ….

But the speed of the asteroid into the atmosphere is faster than that of an intercontinental missile, and it is not so easy to hit it, and only a limited number of friends such as Xia Guo, Lao Mi and Maozi have this technical level.

But it doesn't matter, as long as there are technical partners, the production capacity at home is generally not too bad, but there is no perfect industrial system and needs the support of the global supply chain.

But at this time, who dares not to support it?

So all countries went all out to work overtime and make all their efforts to build missiles.

The ground does not have as many restrictions as the moon, and if you say that a bomber is a real bomber, and if you say a missile, it is also a real bomb.

There are not only fixed anti-aircraft missile positions, but also truck-type mobile launches, train-type mobile launches, silos in the mountains, ship platforms at sea, and even underwater launch platforms.

Missiles are not just a place to be deployed

Not only the direction of the asteroid but also the rotation of the earth and other factors should be taken into account, and the direction from which the asteroid penetrated into the atmosphere and which position of the missile was responsible for intercepting it were all clearly arranged.

Even if you can only increase your chance of hitting by 1%, you have to give it your all.

There are also suicide drones, which actually mean the same thing as missiles, the difference is that the speed is slightly slower, but it can stay in the air for a long time, which is an effective supplement to missiles.

In order to be able to destroy the target cleanly and thoroughly, each suicide drone is prepared with a miniature mushroom bomb, which can shatter even an asteroid with a diameter of several kilometers in one fell swoop, minimizing the damage caused by the impact.

And then there is the electromagnetic cannon, this thing belongs to the last link of the end defense system, once the first two rings fail, it is necessary to rely on the electromagnetic cannon to save the last hope, once the electromagnetic cannon fails to hit the target, you can only resign yourself to fate.

Finally, the organization of the ground forces, although the danger comes from outside the sky, but the ground cannot be ignored, one is to prevent the people from being chaotic due to the war, and the other is to prevent alien species in the sea from taking the opportunity to cause trouble.

Even the reaction of the people has been taken into account by various countries, and there is naturally nothing to say about blocking the aliens, once the defense system collapses, the aliens will land in large numbers...... Where there are weapons and equipment, where there are combat bunkers, how to fight street battles, how to fight positional battles.

In short, it is necessary to plant the seeds of resistance in the hearts of the people, even if all countries are destroyed in this war of extermination, it can leave the last glimmer of hope for human resistance.

What if they come and drive the aliens away?

At the end of March, the first Repulsion ship successfully rolled off the assembly line, but the question of how to sail was extremely entangled.

"There are three main groups of objects coming from the asteroid belt." Everyone gathered in the conference room again, and Gong Yiding pointed to the top view of the solar system and talked eloquently, "The first group is the fastest, the current location is here, and it is expected to reach the Earth at the end of August; The second group is slightly slower, arriving in November; The third group has just flown into orbit around Mars and will arrive around tomorrow in March."

He turned to face the crowd: "The first two groups of small celestial bodies are not very numerous, but they are very scattered, and it takes a lot of time to solve them; The third group of small celestial bodies is very numerous and relatively concentrated, but the alien warships are following behind, and if you want to solve the asteroids, you have to face the aliens first." ….

Listening to him say this, everyone immediately understood the problem.

The first two groups seem to be easy to deal with, but this is only a rough classification, and there are many scattered asteroids between the two groups of small bodies.

In other words, once the Repulsion ship sets sail, there will be no chance to return to Earth for replenishment!

From August to March next year, for more than 7 months, the fuel carried by the repulsion ship will definitely not be enough, and at least two or three replenishments will be carried out.

This is a very troublesome question.

But the first two groups are nothing more than a little more time, and the third group is the real focus.

Only the repulsion ship must not be the opponent of the alien warship, which is about the same as taking the initiative to send people to the head; It is a dilemma to send warships and weaken the defense of the earth.

Several people discussed and discussed, but they didn't come up with any good solutions, after all, whether to attack or not is not what Luoshipshan said.

The final decision of the military was to add two external packs to the Repulsion ship, each containing a nuclear bomb-carrying aerospace fighter as a means of countering the alien warship.

No one expects the two fighters to be able to do anything to the enemy ship, but they are just dead horses as live horse doctors to test the other side's reaction.

In this way, from the end of March to mid-April, six Repulsion ships set sail one after another, flying in different directions to meet the asteroid.

According to the common people's thinking, these small objects come from the asteroid belt and must fly in a direction perpendicular to the Earth's orbit.

In fact, Jupiter and the Earth were still separated by the Sun when the alien species was moving, and when the alien warship pushed the asteroid, it was also in front of the side of the Earth.

After leaving the asteroid belt, those small celestial bodies orbit the Sun and orbit the Earth at different speeds, but in the same direction.

If the earth is regarded as a normal heavy truck, then those small celestial bodies that leave the asteroid belt are a team of cars that ignore the danger and are eager to change lanes!

And there were no brakes on either side, and the impact was inevitable.

The same is true for the Repulsion Ship, which does not break away in a vertical direction, but flies in the same direction outside the Earth's orbit, and if it changes direction slightly when it is about to encounter a detached asteroid, it can blend into the asteroid group and implement the intervention plan.

Since June, the repulsion ship has been close to the target and has intervened in the orbit of the asteroid with a unique repulsion system, with good results.

During this period, the supply ship from the moon resupplied the Repulsion ship seven times, more than double the number of resupply times originally planned.

In August, the first batch of asteroids is about to arrive on Earth, and the space defense system and ground defense system are in full swing, and all space vehicles are ready to collide.

Including the fleet.

In the early morning of August 6, the first asteroid crossed the moon's orbit, and countries immediately issued an anti-collision alert, and all citizens prepared to evacuate.

Half a day later, the asteroid appeared on the outer part of the earth, and people from all over the country had already entered bomb shelters or shelters in advance.

But its orbit was affected by the Repulsion ship, and it ended up passing more than 90,000 kilometers from Earth.

The human base is 65,000 kilometers, and once a small celestial body enters this distance, the space defense network will immediately open fire to destroy the incoming small celestial body.

Next, more celestial bodies flew towards Earth, but the vast majority of them flew by and flew towards the orbit of Venus. ….

Within 12 hours, more than 400 threatening asteroids passed by the Earth, and only 30 or so of them crossed the 65,000-kilometer line and were destroyed by the space defense system.

More than 40,000 pieces of debris fell into the atmosphere, and for the next three days, meteors continued to shoot in the sky around the world, and even in broad daylight, you could see fireballs falling from the sky.

The ground defense system carried out an unprecedented scale of actual combat exercises, destroying more than a dozen large meteorites in the air, which can be regarded as verifying the reliability of the ground defense system.

The meteors then faded until a week later, when the meteor shower came to an end on an unprecedented scale – and no one thought that meteor showers had any romantic connotations.

Only a hundred asteroids eventually landed, and only seven landed in the city, causing negligible damage.

People around the world are relieved that their long-standing worries have finally calmed a little.

On August 14, the meteor shower also left a tail, and the first aerospace carrier passed the acceptance to join the active service, and the military named the battleship Guanghan to commemorate the first permanent scientific research base of mankind on the moon.

Lotu was transferred to the captain, and Ling Xiao also left the Luoshipshan base and officially took up his post.

This is the first aerospace carrier in the history of mankind, and it has entered service with a full force of more than 5,000 people, who are resting equipment without rest, and are training day and night.

In November, the second aerospace carrier, the Antarctic, was officially put into service, and the captain Liu Wenwen and more than 2,000 people, including Ling Xiao, were transferred to the Antarctic.

At this point, the two major battle clusters with the aerospace carrier as the core and the expeditionary warship as the main force have officially become an army.

At this time, there are still four months before the arrival of the alien fleet, which is exactly the same as the previously discovered countdown signal!

The number of warships produced by Luoshipan has been increased to three per month, but the military has not continued to form a new fleet, but has sold all the new warships.

It's not that I don't want to continue, but the time left is too short, and it is difficult for the new ship to form combat effectiveness, rather than holding it in your hands, it is better to sell it to other small partners, even if you play an auxiliary to attract the enemy's firepower, you can also share a little pressure for the main force.

In the following months, Da Mao, Lao Mi and the Europa Alliance successively received warships delivered by Yanjing, and they themselves also had good manufacturing capabilities, and with the great assistance of Yanjing, several warships were built successively.

It's just that they don't have such superior conditions as Luoshipshan, not only is the construction cost ridiculously high, but most of the equipment on the ship is also provided by Luoshipshan.

At this time, it is no secret that Luojian Mountain is among the friends of Blue Star, and everyone's envy has been

It is impossible to put it into words.

The little friends who are not strong enough have no ideas, Da Mao, Lao Mi and the Europa Alliance have been contacting Yanjing through various channels, hoping to get the assistance of Luojian Mountain, and also build a base on the moon.

Yan Jing's reply was only one sentence: Let's talk about it after beating the aliens!

At this time, you still want to build a base on the moon, and you want to eat fart? If you have the ability, you will come by yourself, and if you don't have the ability, you will stare at it, and you will assist, Lao Tzu is not your father!

In late November, a second wave of asteroids arrived on Earth.

This time, the earth is more prepared, and various countries have carried out a comprehensive mobilization in advance, taking this opportunity to conduct a large-scale space defense exercise, destroying more than 100 asteroids passing through the earth.

The simultaneous ground defense drill destroyed more than 600 pieces of debris that had fallen into the atmosphere.

The second round of asteroid attacks was much less dense than the first wave, but it lasted longer, and large and small debris kept falling into the atmosphere for up to half a month! .

Cracks in the metal