The giant ant has a good climbing ability, but the bounce is a weakness, and it can't jump onto the tall crawler car, so it can only climb up desperately.

But the crawler keeps rotating, and the giant ants are not given the opportunity to climb at all, and all the giant ants that are close to the crawler are all run over under the crawler vehicle.

The giant ants are not stupid to drill under the car, they rush to the tracked car in swarms, spitting formic acid into the track, but the United States relies on the track to crush the giant ants, that is, there are no guns and no cannons, no matter how high the concentration of formic acid in the air, there is no open flame and it will not explode!

The Nile Line and the Panama Line have suffered a lot in this regard, and coming up with a way to crush the ant colony with a tracked vehicle may have a lot to do with formic acid.

There are also some spider ants hidden in the large group of giant ants, their number is relatively small, but the role is not small, in the footage you can see some spider ants jumping directly from the colony, directly pounced on the crawler truck and desperately bite...... But the spider ants have no other means of attack except to bite, and their jawbones are no harder than the tracks, and they are finally brought under the car by the rotating tracks, and crushed into a mass of broken worm mud.

Seeing this, Ye Han couldn't help but let out a sigh of relief, he didn't expect the way to deal with the ant colony to be so simple.

Any kind of means used by humans before, aliens can quickly find a way to counteract, and they all start from the genes of the giant ants themselves, making the giant ants more and more difficult, so that the human side has to invest huge manpower and material resources in the two lines of defense, but the effect is very limited.

The tracked vehicle directly uses the method of crushing to deal with the giant ants, and even if the giant ants cross over the vehicle, they still have to face the US troops on the defensive line...... Judging by the current situation, there are very few giant ants that have the ability to cross the tracked vehicle.

Another possibility is for the giant ants to evolve strong enough to withstand the crushing of tracked vehicles, but what does it matter if the aliens do? The Americans could have designed the tracks to be a little more complicated, designed the flat tracks into triangles, increased the pressure by reducing the area, and continued to crush the giant ants.

If the shell of the giant ant becomes harder, you can also add spikes to the tracks to turn the tracks into rolling maces...... There are always more ways than difficulties, and since this solution has been found, what is it to continue to improve the tracked vehicle?

Besides, the attack of the ant colony is probably not sustainable.

This is not Ye Han's intention. Lewd, but the conclusion of many observations and analyses!

To put it simply: the law of conservation of energy!

Giant ants are creatures, even if they are biochemical creatures created by aliens, they follow the most basic laws of nature, they do not appear out of thin air, but hatch from eggs and gradually grow and mature.

Giant ants are an omnivorous giant insect, both animals and plants are their food, but both South American rainforests and African rainforests are limited, after nearly a year of destructive plundering, the two major rainforests have long been unrecognizable, the vegetation in the forest has been reduced by 70%, and the remaining 30% will also be consumed by the ant colony in the near future.

In order to increase the food source, ant colonies have even begun to snatch ant carcasses near the battlefield, a phenomenon that was discovered by the US military not long ago.

The unbridled predation of ant colonies has caused great concern at the top of the world, and if the tropical rainforests disappear completely, South America and Africa will inevitably make great strides towards desertification, and the global climate will be affected by unpredictable effects.

But how can a counterattack be won by paying lip service? Countries also want to eliminate ant colonies, but the reality is that they can't do it at all, if it weren't for the emergence of crawler vehicles, I'm afraid that the two lines of defense are still struggling to hold on to the attack of ant colonies.

In addition to the facilities visible on the ground, the ground was also dug up and a blocking wall deep into the ground was poured like a dam to prevent the giant ants from digging through the defense line.

In fact, it is okay not to dig a blocking wall, the Panama Canal and the Sahara Desert are natural anti-ant barriers, but there are always people who can't let go of this heart.

In short, the situation on Earth is improving, and it is expected that the ant colony will be wiped out before Europa arrives on Earth.

Ye Han knows far more than that, as a soldier, and a soldier who has touched the threshold of a senior officer, he knows much more than ordinary people.

The situation on Earth seems to have improved, but the top leaders of various countries are not carried away by the temporary victory, they know deep down that as long as Europa exists for one day, the threat will exist for one day, and even if Callisto is solved, the aliens who remain on Jupiter are still a threat to humanity.

In addition to continuing to support the two major lines of defense, other plans have not stopped, such as the westward expansion plan in the northern capital and the shelter plan in Washington, D.C., both of which are emergency evacuation plans implemented in response to Europa.

The implementation of the US plan is unknown, but the westward expansion plan has built more than 100 underground cities in the west, and the total number of people who have moved underground is as high as 10 million, and there are all kinds of underground farms, underground mines, and various underground industries.

Judging from what Ye Han knows, if the ground is occupied by aliens or destroyed by aliens, the underground city network can last for at least a few decades in isolation from the ground!

Even the northern capital doesn't know whether the westward expansion plan is a rainy day or a worry, but it's better to have such a plan than to be unprepared, right?

It is said that the North Moon Continent and the South Moon Continent are also part of the contingency plan, but without the accumulation of data for several generations, it is impossible to understand the impact of low gravity on humans.

Human beings were born on the earth and grew up on the earth, and only the earth is the most suitable place for human survival, and the high-level knows very well that all eggs cannot be put in one basket, so even if there is a moon base, the northern capital has no idea of suspending the westward expansion plan.

An old general's words are not rough: no matter what time it is, you have to leave roots on the earth, right?

Of course, the North Moon Continent is also the top priority of the backup plan, once the earth has a case, at least human beings can continue to reproduce on the moon, even if low gravity will cause uncertain effects, it is still much stronger than the extinction of the country.

It is precisely with this development idea that the Northern Capital spares no effort to build the Qiongzhou launch site, and since the electromagnetic orbit has been put into use, more than a dozen or even dozens of spacecraft have been launched every day.

Hibernation in the way of spacecraft lift-off, not only greatly reduce the pressure during the lift-off, but also save the consumption of materials on the road, since the Qiongzhou launch site put into use, has sent nearly one million people to the moon, the current North Moon Continent is enough to undertake the heavy responsibility of human continuation.