The construction of the > submarine base has been completed, and beneath that huge ice cave is an even larger base of operations towering below the ice.

The base of operations consists of electrode bases, supply warehouses, outer walls, howitzer forts, and submarine clusters.

The outer wall is twenty meters tall and is composed entirely of high-strength hybrid materials, which will provide strong protection for the mech wargroup behind it.

Although the base is far from the ice, three thick pipes connect it to the ice, and in order to ensure the safety of this lifeline, two semi-floating fortresses are blocked every 20 meters, thus forming a three-dimensional protection for the base.

The hemispherical base station in the center of the base is the living space of the soldiers, and the soldiers can complete the delivery of personnel and materials to the ice surface through the suspended vacuum ladder installed in the pipe.

In the combat command room, Sachs was carefully observing the holographic map on the command platform, the alien probe had been installed, and the environment in a radius of thousands of square kilometers was already under surveillance, but the unexpected silence always made him feel faintly uneasy.

As the so-called generals are not subject to military orders abroad, the headquarters on the ice also understands this truth, so they grant him great power and allow him to act at his own discretion. But so far, Sachs still doesn't dare to move.

He sends more recon bots out, and then he encounters something that worries him. As soon as the reconnaissance robots leave the range of the alien probe, the transmitted images will be immediately interrupted.

Hundreds of them did not have anything out of the ordinary, which was obviously done by the enemy.

The commander of the expeditionary force, His Royal Highness Yan Chengjian had asked many times, and although he did not urge, Sachs knew that General Yan wanted to carry out the plan and build more bases.

After a long silence, Sachs picked up the phone, and then began to report to Yan Chengjian:

"Your Highness, I suspect that this is a trap for the aliens."

On the phone, Yan Chengjian didn't reply, on the battlefield, when will there be no traps? The Martians have no way out, and the enemy on the pillow will not be eliminated for a day, and they will be restless for a day!

After a long time, Yan Chengjian's voice came from the phone: "Since this is the case, let's take the initiative, you can ......"

Before the words could be spoken, a "rustling" sound came from the phone, and communication between the base and the ice surface was suddenly cut off.

"What's going on?"

Sachs shouted, and the guards ran in through the door, but everyone in the war room had already noticed the problem without him having to check.

Before the cannon, He Qiliao was driving the mecha to deliver supplies, and when he looked up by chance, he saw the scene that frightened him.

Above the base, eight hundred meters, the water is freezing there.

He could clearly see the ice crystals condensing, as if spreading, and the pale color was spreading out, soon covering the entire sky above the base station.

The sudden ice thickened like a plant, and the huge ice quickly touched the ice cave in the sky.

"What's going on? Is our de-icing unit not working? ”

Inside the ice command headquarters, Yan Chengjian was faintly uneasy, he could see that those red beams of light were still spraying into the ice cave, and the ice surface suddenly condensed, this situation was extremely abnormal.

Sure enough, the guards came back with a report that everything was normal, and the alarm suddenly sounded on the ice and underwater.

The Xenomorphs are on the attack.

"Fire on the ice!" Sachs gave the order, and several fortresses in the base opened fire at the same time, the few particle weapons under the ice, which easily blasted the sudden ice blocks to pieces.

However, this did not end there, as there was glue between the broken ice, and more ice crystals condensed between the broken pieces, and the broken ice pieces were frozen together again.

"Find out why the water is freezing right away." Sachs roared and gave the order.

The freezing under the ice is extremely abnormal, and if this situation is allowed to develop, the entire combat unit will be trapped underneath.

There was a sound of "whoosh", and a trace of electricity came from the sky in the distance, and an alien was cut in half and fell, and the entire base suddenly sounded an alarm.

As if out of thin air, countless red dots suddenly appeared around the base on the central control console, and the aliens on Ganymede finally launched an attack on the expeditionary force.

More lightning flashed out, illuminating the entire ocean floor.

These are the interstellar alliance-aided Frozen Spirit Bombs, which the Expeditionary Force has placed around the base to use in conjunction with the Alien Exploration Pile.

The power of the frozen spirit bullet slowed down the attack of the aliens, but the frenzy of the aliens behind still surged up fiercely.

Three xenomorphs lunged at the transport pipe, and as they approached, two transparent balls of light appeared around them.

The sea water around the aliens immediately froze, and in just a moment, the three aliens were frozen inside, and their forward posture was still vivid.

There was a "pop", and a large number of cracks spread on the ice, and then the ice exploded violently, and the three aliens were easily torn to pieces.

"Fire", Sachs gave the order directly in the base broadcast, and the entire undersea base seemed to shine brightly, and countless points of light shot out from the base.

Two kilometers away from the walls of the base, the two aliens had just dodged the attack of the Frost Bullet, and just as they were about to accelerate, a fiery red ball of energy exploded next to them.

The muffled sound of "boom" was like a thunderclap in everyone's heart, and a large cloud of bubbles swelled around the two aliens, and then just like the birth of the universe, the entire seabed shook violently, and the sea water shot out violently.

The two aliens were crushed by a boulder, their bodies were flattened, and then they were blown out. The entrails were dragged out of their bodies, and the two aliens couldn't live anymore.

The aliens were attacking so fiercely that they didn't care about death at all, but in the blink of an eye, the insects had approached a thousand meters from the city wall.

More frozen spirit bombs were detonated, the firepower of the base became more ferocious, and the sky above the undersea base was like boiling water, and countless energy waves and dense water bubbles all rushed up to the sky.

When these bubbles soared to a distance of 800 meters, they were blocked by the ice, and the bubbles rolled outward along the ice side, and the sky of the entire base station was like a soap bubble, but the crystal that reflected the fire made everyone feel the breath of death.

Because of the accumulation of bubbles, the soldiers in the base station suddenly discovered the cause of the icing.

Sixteen thick icicles stretched out beyond the ice, and these icicles appeared even more crystalline, and the icicles spread tens of thousands of meters away, and then connected behind a giant alien tail.

These aliens are far larger than the attacking aliens, and the sudden freezing of the seabed is caused by them.