> "squeak", a black shadow twisted, broke through the ice, and burrowed under the ground. After more than ten minutes, countless beads fell from the sky, like rain, and in the sound of "poof, poof", these beads were embedded in the ice.

The metal surface of the beads began to crack, and six thin metal legs came out of it, and with a flick of these six legs, the beads flipped over.

By this time, the metal beads had turned into micro-robotic bugs, which scavenged through the ice and burrowed beneath the ice.

In the headquarters, various intelligence analysts were carefully analyzing the transmitted images, and in order to reduce the casualties of the soldiers, the expeditionary force suspended the offensive plan and instead stationed a large number of reconnaissance robots to the satellite.

In space, the human defense line has completely blocked the sky of Ganymede, cutting off its connection with the outside world, and now the work that needs to be done is how to completely remove the aliens on Ganymede.

A day later, the gloomy clouds in the sky suddenly boiled, as if a large hole had been broken, and a huge hull descended.

When the spacecraft was more than a thousand meters above the ground, three thick spiral brackets stretched out.

With a "poof", debris flew on the ice, and the scaffolds dug into the ice, and then a layer of steel plates was held there, so that the ship was firmly fixed in mid-air.

More ships landed, the aliens did not launch a surprise attack, and the expeditionary force successfully completed the first landing attempt.

In the command ship in space, Yan Chengjian and them were not easy, and the monitoring screens went out one by one, which showed that the aliens under the ice were clearing the robots of the expeditionary force, and the aliens were not sitting still, they had their own combat plans.

"Break through the ice and prepare for an undersea battle."

The command was delivered, and the laser beam ejected from the ship, and as the light moved, a huge hole cracked in the ice.

The three spacecraft cooperated, and four straight lines were cut, and when the lines were closed, a "suddenly" sound was heard, and the area of tens of thousands of square meters of ice sank suddenly.

Because of the pressure of the ice squeezing, four walls of water nearly 100 meters high rushed up, and then flowed out along the ice with a "bang".

A much thicker ray of light shone on the cut ice, and the huge ice began to dissolve, and when the ice completely melted, a huge ice cave with a height of more than 500 meters appeared in front of the expeditionary force.

From the outside, the ice wall is as steep and majestic as a cliff, and down the ice wall, the bottom is rippling water, and the light reflects off the water, making the bottom look unfathomable.

"Bomb throwing!"

With an order, more than ten huge bombs were thrown, the bombs fell into the water, and then sank to the bottom of the sea, about ten seconds later, the vibration under the feet came, and a large number of bubbles poured up in the sea at the bottom of the cave, and then the whole sea was raised upward, until it arched to be level with the ice surface, and then sank again.

"The submarine went into the water."

All the ships opened their hatches, and nearly a thousand streamlined submarines flew out, which were purely offensive weapons with powerful underwater attack capabilities. With the sound of "plopping", these submarines all escaped into the ice cave.

Ma Tianyuan and He Qiliao were in a very worried mood, and their eyes were nervously fixed on the beam screen.

It may have been a bad decision, but the sense of mission led them to board the submarine, and they wanted to avenge their comrades who had been with them all day and night.

The two of them still held support positions, looking at the mechs standing solemnly at the exit hatch, the two shouted and cheered for them.

The submarines immediately dispersed, the muzzles of the black holes were all pointed outward, and the self-propelled robots were the first to be released.

The bottom of the screen was still very calm, and there were some shredded flocculent things floating in the sea, which were lifted from the bottom of the sea by the bombs that had been dropped earlier, and the eerie silence made everyone tense their nerves.

The armed mechs were released, and the attacking forces took control of an area of hundreds of square kilometers under the ice, however, the xenomorphs still did not appear.

Frowning and staring at the transmitted data, Yan Chengjian decided to continue with the plan, so three thick pipes with a diameter of ten meters were inserted from the ice cave into the seabed.

This is the plan of the expeditionary force: first establish a beachhead on the bottom of the sea, and then rely on this to spread around, and gradually compress the space of the alien in the way of cannibalization, and finally achieve the goal of total annihilation of the alien.

This pipe is a supply channel, which will provide nourishment for the troops below the surface, and with its support, the expeditionary force can send more troops below the surface.

More than 1,000 submarines were reinforced, and the number of armed mechs that reached the bottom of the sea reached 300,000.

Controlling the exoskeleton mecha, Ma Tianyuan and He Qiliao seem to be at ease, they are now completely skilled workers, and it is not a problem to complete these installations.

In the center of the submarine position was a large semi-circular barracks, on which the three supply pipes were connected, and a large amount of supplies were continuously transported and then transported to the various weapon installation points by automatic conveyor belts.

The cannons on the seabed are different from those on land, because the seawater has a certain effect on the propagation of particle beams, and the seawater has an excellent propagation effect on shock waves, so the weapons here are more energy-based.

Each cannon was filled with energy balls, which looked glowing, but everyone was careful when they were handling and placing them.

These energy balls have great power, one is enough to level a small mountain, it was developed by the people of the Great West Country in a targeted manner, all for today's undersea operations.

With a roar, more armored combat vehicles drove into the bottom of the sea, and these devices were actually armored howitzers.

A day has passed, and the human position on the bottom of the sea has begun to take shape, but the expected alien harassment has not appeared, are these bugs all killed in space?

The staff of the expeditionary force is very busy, everyone is analyzing the current situation, this is the first time that the Martians are mainly themselves, fighting aliens in space, new enemies, such a situation makes them scratch their heads at all.

"Continue to strengthen the construction of positions, since the alien has left us time to prepare, I don't believe that we can't hold it at the bottom of the sea."

After conveying the order, Yan Chengjian still felt quite uneasy, so he asked the adjutant, "Isn't there still any news from the two cultivator teams?" ”

The adjutant stood up and replied, "Your Highness, General Zhang, they went to the shadow area of Ganymede, and they were worried that there were other arrangements for aliens over there. Because of the influence of the planet's magnetosphere, we still can't contact them. ”

Yan Chengjian sighed: "Then now we can only rely on ourselves." ”