Zhang Binhui pointed out two positions on the submarine base: "As for why the troops are divided? In fact, it is for the purpose of preventing hardship.

The underground hole area is too wide, and the early battle will be very difficult, and the situation of the alien flanking us before and after will definitely appear.

In the first phase, our troops will reach more than 3 million, and all of them will be concentrated together, and it will be inconvenient for personnel and equipment to deploy, and it will not be conducive to our advancement.

If the two parts are separated and a pincer formation is formed, then our two troops can reflect each other.

In addition, we must have reserve troops, and when any branch is under too much pressure, the reserve troops must be thrown in to reduce their burden. ”

"And what about the blockage you are talking about? How to block? ”

Yuan Yuanzi asked.

Zhang Binhui drew a circle around the two attack points: "After the area of attack is selected, the scope of the blockage will naturally be reduced a lot, and we can completely operate this."

You see, the alien retreats are actually roughly the same as those of us cultivators, and they also have higher requirements for the structure of the medium—that is, the medium should be relatively stable, and the composition should tend to be single.

That's easy.

Fighting underground, we are most afraid of being surrounded by aliens, so blocking is still necessary. We can make a lot of construction machinery, and scrapped combat equipment can actually do it.

As long as the machines can keep them running simply, just throw them underground.

In order for the aliens to pass through those places in large numbers, the complex structures, the still functioning machinery can force them to appear, and the aliens either violently destroy the preparations, or bypass them. But in the end, it's going to be a lot harder.

We will install a large number of sensors in these devices, so that we can give early warning, and we will not be afraid of aliens from behind. ”

Everyone nodded: after a few months of fighting, the last thing the expeditionary force lacked was these scrapped or semi-scrapped things.

As long as their bearings are still functional, dragging them underground with a self-propelled vehicle can achieve the goal, which is indeed a great way to protect the flanks.

The general operational ideas were drawn up, the General Staff began to study in detail, and a day later, a complete and detailed plan was laid out on the desk of each general.

……

At the second submarine base, a large artificial crack was created by the expeditionary force. The fissure was like a giant scar on Europa, and there was no end in sight to the deep cliffs.

The expeditionary force created a canopy with a length of ten kilometers, which separated the crack from the sea, and it became a completely different world underneath.

An army of a million was assembled here, and a larger number of combat readiness were lined up. Next to the team, there is a huge number of self-propelled vehicles, which carry a large number of scrapped machinery.

The engineering troops simply repaired these devices, no matter what these scrapped things used to be, and now their main bearings are still "buzzing", and it is believed that it will take a lot of effort for the aliens to pass through or destroy them.

Base 2 is mainly composed of Earth Coalition forces. Because of the particularity of the tunnel warfare method, the use of lava mechs is less urgent, so the equipment of the earthlings can also adapt to the development of the battle in the center of the earth.

Ma Tianyuan and He Qiliao naturally became the commanders of this team.

Along the entrance to the crack, the million fully armored troops had been assembled, just waiting for an order from the command.

At one o'clock in the morning, all the deformed tanks turned on their searchlights, and the ten-kilometer-long crack was suddenly illuminated.

"Let's go!"

With Ma Tianyuan's order, the mighty team drove into the crack.

It's like drilling into a canyon, the ramp under the crack gets steeper and steeper, and all the deformation tanks complete their transformation. The hard rock on the ramp began to turn into powder under the crushing of millions of steel.

The huge team entered the crack through a hundred passages, and the detachment led by Ma Tianyuan walked in the middle of the cliff.

He skillfully manipulated the mecha to step on a boulder, and then with a "bang", the piston released the pressure, and the mecha's left knee bent back, and its right foot poked down, stepping on another stone two meters away.

At this time, the alarm in the cockpit sounded, and in the holographic simulator, a stone weighing nearly one ton was crushed by the mecha above, and the stone bounced and smashed down at the mecha piloted by Ma Tianyuan.

With a "squeak", the shoulder cannon on the mecha's shoulder automatically turned, and a particle beam blasted out.

With a "bang", the particle beam accurately shot on the stone, and the stone was blasted into powder on the spot, and the fragments smashed on Ma Tianyuan's mecha, and then ejected in all directions.

"The assault forces switched to airborne mode, paying attention to covering each other."

With a loud shout, Ma Tianyuan jumped out of the cliff.

For a moment, the lights around the cliff flickered, and millions of mecha of the combat troops jumped into the air at the same time, and this huge crack was instantly covered by a little starlight.

With a "buzz", millions of boosters were activated at the same time, and with a loud "boom", there was a huge shaking in the cliff, and all the attacking troops landed on the ground.

With the mech's searchlight, the warriors were stunned by the situation on the ground, and they were in a pothole-ridden place.

The ground here is covered with large and small openings, the large ones are more than seven meters in diameter, and the small ones are about five meters in diameter.

Each cave is less than 100 meters apart, and the deep inner diameter is facing the sky.

The edges of the cave are relatively smooth, indicating that there are often aliens passing through here, and on the walls of the cave, some slime can occasionally be seen, which drips down the weight, and sets off these deep holes even more terrifyingly.

He Qiliao squatted down, he operated the mecha and stretched out a finger, picked up a touch of slime from the edge of the hole, and then put it under the "nose" and sniffed it.

The elemental analyzer installed there immediately analyzed the composition of the mucus: 30 percent acid, 40 percent "bitter horse", 20 percent elemental allergen, and the alarm system was immediately activated - these things were left behind by the aliens.

"They know we're coming."

He Qiliao and Ma Tianyuan glanced at each other, and the same thought came to their minds.

Six hundred kilometers away, the Great Western Attack Force sent back the message: they had reached the surface of the pothole, and ten minutes later they launched a simultaneous attack.

Ma Tianyuan took a long breath, his mecha straightened up, and the steel giant fist was raised into the sky, and the heartbeat of each warrior immediately became violent.

"Nineteen, eight, seven, six, five, four, three, two, one—attack!"

Millions of mechs leapt into different pits.