Halsey couldn't believe his eyes, and after thinking about it for a long time, he couldn't figure out what these fluffs were, and the think tank of the international fleet had not encountered such a situation either.

It turned out that Europa was going through the motions, but the fluff in the hole gave Halsey a blow to the head, letting him know that Europa did not give up resistance, but that the aliens took the initiative to put the battlefield underground!

It's not a problem to flatten the surface of Europa, but even if Ganymede is turned into a glass sphere, how the aliens under the earth should live or how they live, will not achieve the goal of eliminating aliens at all.

Halsey wasn't a rigid person, and since the original hole couldn't get through, why not just restart the stove and dig a new passage into the depths of the earth?

It just so happens that giant ants are also good at digging holes.

A command was passed down, and the giant ant immediately withdrew from the burrow and found a place far from the burrow to bury its head and dig it.

Ganymede's density is not high, and the gravitational pull is very low, and the giant ants are digging much faster than expected, digging into the ground in just a few moments, out of sight of the fleet.

After going 10 meters underground, the tunneling speed of the giant ants decreased slightly, and when it was about 20 meters, the excavation speed decreased significantly, and when it was 30 meters underground, the excavation became very difficult.

If it was just a group of giant ants that had an abnormality, it could be explained as an ice vein, but all ant colonies encountered this situation, which is very revealing.

In order to figure out the situation, the operator controlled the drone to approach the broken clod, carefully observed the section of the clod, and then, found dense filaments on the cross-section.

Halsey's whole person is not good, it's not strange to have this thing in the cave, why is there it in the soil? What did the aliens do to Europa? Do you have to bomb it with a nuclear bomb to get underground?

It's also that the means of giant ants are too simple, if it is the servants who land, the situation will definitely be much better than now, if it is the marines who land, maybe they have already attacked the ground and exchanged fire with the aliens.

Halsey immediately thought of the airports on the back of Ganymede and immediately ordered the fleet to bypass them, but he was soon disappointed, and the battleship fed back the message to the flagship that the three airports were blocked.

Setbacks followed, but Halsey was not discouraged at all, and launched the entire fleet, and everyone worked together to figure out a solution.

In fact, he already had an idea in his heart, that is, to join the Marine Corps, but as soon as this idea came out, he was immediately vetoed by himself.

The international fleet has no servants at all, it's not that the north doesn't give it, it's not that Washington doesn't want it, it's just that the production is too low, and the more than 40,000 cloned before the fleet sets off have a place to go.

There are a few marines, according to the standards of international fleets, each capital ship is equipped with a platoon, the aerospace carrier is equipped with a company, and there are some sailors who can take up arms and participate in battle.

At present, there are more than 40 warships and more than 1,400 marines on Callisto.

At first glance, Halsey's Marines were numerous, but if they were sprinkled on Europa, they would be like pepper in a pot, and they wouldn't be able to make a splash.

Reluctant to let the Marines find a way to do it to the giant ants, Halsey immediately thought of the sea of ice on Callisto...... Aliens can bury filaments in the soil, but they can't bury them in the ice, right?

He immediately issued a series of orders, and the fleet that received the order immediately went into action, and the fleet that had been gathered scattered in all directions, looking for a suitable sea of ice.

The location of each ship is not so simple, one is because the ice sea on Europa is very complicated, some are pure water ice, some places are low-temperature solidified air ice, and there are mixed ice of water ice and air ice, and no matter what kind of ice it is, it is more or less mixed with some impurities, and there are few impurities, not to mention, where there are many impurities, take a piece of ice at random, and after melting, it will be a mess of mud.

Second, because the giant ants have limited time in the vacuum environment, they must return to the transport ship every few hours to breathe oxygen and eat a lot of food to replenish the depleted physical strength...... The servants have the same flaws, so it's not that the human is not technically adequate, but that there is something wrong with the genetic source.

The landed transport ship cannot be moved, and when the ant colony leaves the transport ship, it will not be able to obtain the necessary logistical replenishment, and after exhausting the reserves in the body, it will only wait for death.

Therefore, the location of each ship must meet the two conditions of low impurities and proximity to the ant colony, so the choice of targets is very limited, and only four positions in all candidate targets meet the conditions.

After each ship arrived above the target, it immediately adjusted its attitude, the bow of the ship was facing the ice sea, and then fired at the ice sea with the laser main gun, intending to use the laser to penetrate the ice and open an ice cave for the giant ants to go straight to the bottom of the sea.

It doesn't matter if there are filaments under the ice, no matter how strong this thing is, it can't be unscathed by the continuous exposure of the laser.

While the fleet was in action, all the giant ants withdrew to the transports and stood by.

There was some distance between the transport ship and the ice sea, and the ant colony should have set off early, but in order to save the ants time outside, the ant colony had to be withdrawn to the battleship.

It wasn't until half an hour later that Halsey ordered the giant ants to set off, and there were not many of them.

The colony arrived in the ice an hour later, by which time the marines escorting the nuclear warhead had landed for a while, and they hurried to secure the nuclear warhead on the giant ant's back.

At this time, a hole had been drilled in the ice sea that I didn't know how deep, and after the giant ant approached, the battleship stopped shooting, and a drone drilled into the ice cave, and the battleship quickly got the data it wanted: the ice cave was seventy-four kilometers long and fifty-three kilometers vertical.

Halsey didn't know how thick the velvet layer was, but no matter how much this thing was, it couldn't go deeper than fifty kilometers into the stratum - aliens have this ability, but aliens definitely don't have so many resources!

The giant ant carrying the nuclear bomb immediately set off, quickly crawled into the straight ice cave, retracted its legs and lay on the ice, and slid all the way to the bottom of the cave like a slide.

The giant ant has no intelligence at all, and it doesn't know what it's on its back, and it doesn't know that it's about to send it to hell.

The giant ants are just living tools, no one cares whether they live or die, the battleship commanded, the nuclear bomb detonated instantly, the ice cave first lit up, and then the surface of the ice sea trembled violently, first bulging and then denting, the ice cracked in a large area, and a large amount of steam rushed into the sky from the cracks, but soon disappeared.

By the time the ice sea had calmed down completely, the originally flat ice surface had become a small basin with a vertical depth of more than 300 meters.

The ice exploded, but more than 300 meters was really too shallow, and it couldn't achieve the result Halsey wanted.