Finally, after Liu Qingshan lost three mammoth tanks in succession, the reconnaissance vehicle finally unfolded into an outpost position. Immediately afterwards, Liu Qingshan couldn't wait to build his second tank factory there. As the tank factory rose on the ground, five B-anomaly drones began to fly around, looking for targets that could be repaired. After seeing this, Liu Qingshan couldn't help but feel very pleased. Immediately, the few mammoth tanks that had just been withdrawn from the front line were mobilized around the tank factory. I saw that those maintenance drones were very dedicated and immediately started their maintenance work.

This kind of maintenance drone has very superb maintenance technology, and, because of their very small size, it is very mobile and flexible, and can lead any position anytime, anywhere, as you like, to carry out targeted repairs to damaged areas and components. Soon after, the mammoth tanks, which had just been withdrawn from the front line, had been restored and looked brand new. At this time, what made Liu Qingshan very happy was that one of the mammoth tanks that had just been repaired had been upgraded to a two-star veteran level. Hahaha, damn it, that's great news.

Anyone knows that once you upgrade to the star veteran level, you will not be far from the three-star elite level. Actually, this is also quite normal. After all, these mammoth tanks, and those three-legged alien monsters in the alien alien side, have experienced such fierce battles, and the battle time has been so long, and the battle process has been tragic, and it is very much a letter. However, now, in his own forward position, Liu Qingshan has finally built his own tank factory, which means that his combat units that have suffered a loss of health can be withdrawn and repaired at any time.

In this way, naturally, in a large way, the combat performance of one's own combat forces has been greatly improved. Judging from a certain Cheng dù, before the construction of his own chariot factory, the alien aliens were not able to break through the position, which means that Liu Qingshan has basically won this protracted battle. Now that the tank factory has been built, it is very difficult for the other side to destroy one of their mammoth tanks. It can even be said that here, it is no longer just a battlefield, for Liu Qingshan, it has even been transformed into a training ground. The actual battles, brutal battles, and fierce battles in this training ground can accumulate enough experience points for their mammoth tanks, which is very beneficial for them to upgrade to the three-star elite level as soon as possible.

－－－－－－－－－－－－－－－－－－－－－－－

Now, Liu Qingshan even dared to say that as long as he had five three-star elite-level mammoth tanks, then he could crisscross this continent, and any combat force of the alien alien would be useless in front of his five three-star elite-level mammoth tanks. At that time, he will be invincible. No force can overcome itself.

Sure enough, as Liu Qingshan expected, with the difference in time, the number of troops invested in the battlefield became less and less. As for Liu Qingshan, due to the successful construction of that chariot factory, he can provide health maintenance for those mammoth tanks with strong trees at any time. So, although in terms of the number of battles,

－－－－－－－－－－－－－－－－－－－－－－

In the end, Liu Qingshan finally defeated the alien alien side's attack on his defensive position on the eastern front. However, at this time, there were already four of the dozen or so mammoth tanks deployed there. Moreover, although these four Mammoth tanks have accumulated enough experience points, most of them have only been upgraded to the level of a one-line veteran or a two-star veteran, and none of them have broken through the three-star elite level. This is also the only place where Liu Qingshan feels some regrets.

However, despite this, because Liu Qingshan finally built a tank factory on the Eastern Front, with the excellent maintenance service of the maintenance drone, in fact, only four mammoth tanks were squeezed to the point that they were still able to hold out for a period of time when the soldiers did not rush in without new combat forces. Despite this, Liu Qingshan still felt that he had to do his best to replenish more combat forces for his defensive positions on the eastern front. Only then can you plan ahead, just in case.

However, there is one thing that makes Liu Qingshan still feel a little worried. That is, the current ore reserves of the Tiberon deposit in Tong County have almost been collected. In this case, Liu Qingshan had actually carried out reconnaissance before this, and the only thing that could replace this Tiberon deposit on the eastern front was another Tiberon deposit on the northern line. Although the reserves of Tiberon ore are not as abundant as those of this deposit on the Eastern Front, at least, that Tiberon deposit is closer to its base military base, so it is more conducive to collection.

Under such circumstances, Liu Qingshan could only transfer his mining vehicle to the route of ore collection from the eastern route to the northern route. At the same time, in order to ensure the safety of their mining vehicles, it is natural that the seven mammoth tanks defending on the northern front, when they reach the defensive position, must also move north. In other words, the defense of the northern front had to be extended to the location where the Tiberon deposit was located.

In time, for Liu Qingshan, it is not a problem to push the defense of the northern front to the north. Even if it's a little farther away from your home base, there's nothing wrong with that. The key question is whether the defense force there can carry out effective defense in the face of an attack that may be launched at any time in the face of alien aliens, especially when the satellite aliens come to attack their own mining vehicles, with the defense combat force there, whether they can fully guarantee the safety of the mining vehicles that carry out ore mining there, which is the key to the problem.

In this case, it remains to squeeze into one of the most essential problems, that is, the problem of production and construction funds. During this period of time, because Liu Qingshan has restored the economic development system, he has accumulated 20,000 or 30,000 yuan of production and construction funds in his hands, and it can be said that the author has already paid a lot in hand before. In this case, the main direction of Liu Qingshan's fighting method production is still placed on the mammoth tank. After all, this is its main tank and its main combat force. Not only can it carry out a counterattack, but the missile defense system it is equipped with can also attack and attack targets in the air. This is also the main reason why Liu Qingshan has always been so fond of this mammoth tank.

－－－－－－－－－－－－－－－－－－－－－－－－

However, on the other hand, Liu Qingshan also realized that it was unrealistic to rely only on mammoth tanks for air defense. After all, the main target of this mammoth tank is still ground targets. Although his anti-aircraft firepower is not very bad, however, the Mammoth tank of the Anomamoth is relatively slow, lacks mobility and flexibility, and therefore, at some critical times, it is not able to complete the air defense mission well.

Therefore, in this case, Liu Qingshan still focused on creating his own real air defense weapon - the Fire Eagle fighter. The Fire Eagle fighter, as the most important air combat force in Liu Qingshan, was praised by Liu Qingshan as his "long sword in the air". That's really the case. The Fire Eagle fighter is very outstanding in all aspects such as flight speed, attack firepower, and defense capabilities. Knowledge, this kind of Fire Eagle fighter, the cost is high, the production speed is relatively slow, therefore, if there is not enough time, enough financial resources as support, then, to really form combat effectiveness, it is not so easy.

So far, Liu Qingshan has only built three airfields, each of which can compete with four Fire Eagle fighters. Therefore, in fact, the number of Fire Eagle fighters in Liu Qingshan's hands is only twelve in total. These 12 Fire Eagle fighters have one flight squadron for every four thousand miles, and one flight formation for each air. Therefore, under the current situation, Liu Qingshan actually has the air combat strength of the three Fire Eagle fighter flight formations. In this way, when this duel with the alien alien side is held, there is one more trump card.

"The focus of the northern route now is to protect the ore collection of its own mining vehicles, and carry it out safely and normally! This is a must, and it is also a prerequisite for the development of one's own military base! Liu Qingshan thought secretly.

However, just when Liu Qingshan had just deployed some of the newly produced Fire Eagle fighters in the direction of the northern front, there was another crisis on the eastern front! Yes, once again there is a crisis!

On the Eastern Front, since Liu Qingshan did not deploy more combat forces there for the time being, especially when the resources of the Tiberon deposit there were close to exhaustion. However, now, on the alien side, the alien alien actually sent several large air biological warships, the destroyer battleship, to once again launch an attack on the defense of the Eastern Front!

Of course, Liu Qingshan knows very well about the kind of destroyer battleship. It can be said that it is the most mobile and flexible air warship in terms of alien aliens. Although the destroyer warship does not have the ability to fight against the air, its ground attack capability is absolutely quite strong. It is capable of launching an incomparably powerful air-to-ground high-explosive bomb, and this kind of high-explosive bomb can form a carpet-like bombing effect when attacking the ground, and the killing area is almost unique.

Moreover, more importantly, this alien alien destroyer warship has very good stealth capabilities, and can evade the tracking and reconnaissance of the opponent's radar detection system above a certain range. In this way, it was able to buy time for a "surprise attack" on a large scale.

It was precisely because that kind of destroyer battleship had such a very good ability, so it wasn't until they appeared in the sky above the eastern front of Liu Qingshan's defensive position, yes, it wasn't until this time that Liu Qingshan discovered these behemoths!

"Enemy attack! Enemy attack! Enemy attack! At this time, the air defense alarm set up by Liu Qingshan there finally began to call the police! And then, the four mammoth tanks,-

―――――――――――――――――――――――――

The current situation is really not optimistic for Liu Qingshan. Yes, it is. Although, the four mammoth tanks have been upgraded to the level of a first-line veteran or a two-star veteran, and they also have a certain degree of air defense combat capabilities. However, even so, then again, this mammoth tank, after all, does not belong to the professional level of anti-aircraft firepower. Therefore, in this situation, in the face of the sudden appearance of alien alien warships in mid-air, although some anti-aircraft missiles were fired one after another, they did not play any obvious role.

On the contrary, the few destroyer warships, the kind of carpet bombing, almost brought disaster to Liu Qingshan's four mammoth tanks. Boom, boom, boom...... The explosions continued one after another, and the dark red explosion flames came and went, and as a result, Liu Qingshan was quickly treated as three mammoth tanks, drowning in the crazy dark red explosion fire. Although, there is a war factory maintenance drones, constantly through guò meticulous maintenance, constantly restoring their health. However, after all, this kind of attack is so powerful that it is almost breathless. One after another, one after another, as if every place was filled with the smell of gunsmoke, and it was deeply affected by the violent explosion shock wave.

Soon after, two of the Mammoth Tanks, unable to hold on any longer, exploded into countless wreckage and debris in the deafening sound of explosions, scattering in all directions. Above the ground, there were wreckage and debris of the chariot everywhere, dense craters everywhere, and thick smoke everywhere. The battlefield on the Eastern Front, which had just calmed down, was once again filled with a very strong smell of gunpowder at this time.

After seeing this, Liu Qingshan couldn't help but smile slightly. He knew that he was fortunate that he had carried out the construction of his air force in a timely manner. Twelve Fire Eagle fighters were stationed on those three airfields. Now, it's time for them to come in.

So, after thinking of this, with Liu Qingshan's order, the twelve Fire Eagle fighters were divided into three flying formations, from the left, the middle and the right, forming a battle formation, roaring into the sky, crossing the sky, and heading towards the eastern front.

－－－－－－－－－－－－－－－－－－－－－－－－－－

So, immediately afterward, in just a dozen seconds, the three-gram flying formation of the Fire Eagle fighters had already flown over the battlefield on the Eastern Front. At this time, the rapid destruction of the alien alien warship was frantically continuing to carry out that terrible carpet bombardment. On the ground, the sound of explosions sounded again and again. Moreover, the target of the other party's attack has obviously been transferred to Liu Qingshan's war factory.

Yes, the war factory, which looked like it was filled with gunsmoke, was open with a billowing dark red fire. At least sixty percent of your health has been knocked out. The situation seemed unusually urgent. At this time, under this circumstance, a flame of anger appeared in Liu Qingshan's eyes. Immediately afterward, with an order, twelve Fire Eagle fighters, from three directions, began to launch air-to-air attack missiles one after another at the target.

Whoosh, whoosh...... In this way, one meter after another, air-to-air missiles shot out, flew across the sky, and attacked the target. Those air-to-air attack missiles fly on very strange trajectories, the speed is very fast, and the space is distorted wherever they go. Obviously, one can see this momentum and know what kind of attack intensity this air-to-air attack missile has. What kind of lethality does it have?

Sure enough, a short time later, it was several air-to-air attack missiles that hit the target one after another. In the middle of the air, those alien alien destroyer warships, after being attacked by the anti-aircraft missiles of the Fire Eagle fighters, did not seem to feel anything at first. The ground offensive continues. However, it wasn't long before things changed. And the anti-aircraft missiles of the Fire Eagle fighters, after hitting the target fiercely, with a deafening explosion suddenly came, in mid-air, the fire was shining, and every explosion could make those satellite alien eggs that were attacked destroy the Miè battleship and roar wildly. This shows what kind of lethality has been caused to them.

Space distorts, heaven and earth change color. The explosions continued one after another, and the battle situation immediately developed in favor of Liu Qingshan. Yes, even Liu Qingshan himself didn't expect that his Fire Eagle fighter would be so powerful against that kind of alien alien destroyer battleship. It didn't take long at all, facing the frantic attack of the twelve Fire Eagle fighters, and soon, in mid-air, some of the alien alien destroyer warships exploded directly in mid-air. And some, in the midst of screams, roared and roared frantically, while hovering and tumbling roguely, and then fell from the sky, slammed headlong into the ground, and exploded into a sky-high garrison fire.

In this way, Liu Qingshan finally succeeded in touching the twelve Fire Eagle fighters, and successfully wiped out the target, the alien alien destroyer warships. As a result, the Fire Eagle fighter once again wrote a glorious stroke in Liu Qingshan's combat history.