The sound of "sand, sand" continued to sound, and in every corner of Europa's seabed, the expeditionary force dumped heavy trucks one after another, so that a large number of microrobots were dumped on the seabed like grains of sand.

The pinky-thin grains of sand began to split when they hit the ground, and six long metal legs stretched out from within, and then the miniature robots ripped open the ground and burrowed into the ground.

In the prelude to the decisive battle here, the expeditionary force must know the situation underground in detail. And because of the strong anti-reconnaissance capabilities of the aliens, the expeditionary force has created more than a billion microrobots, and they want to rely on their numerical superiority to overcome the obstacles of the alien manufacturing.

In the central control room, the information fed back was immediately drawn into a map, and in the holographic map in the center of the war room, a red line was fleeing downward around Europa's core.

After the red line, the situation underground is clearly revealed.

But the actions of the humans were soon discovered by the aliens, and the red lines began to "break", which was the reason why the microrobots were destroyed by the aliens.

It was also at this time that a blue point of light appeared in the red line, which was a reconnaissance spirit weapon supported by the Alliance.

There are fewer of them, they are even more difficult to detect under the cover of the robot tide, and its functions are more powerful, which is the real reconnaissance workhorse of the expeditionary force.

The micro-robot succeeded in attracting the attention of the aliens, and the Scout Spirit Weapon penetrated even deeper.

When these "spearheads" escaped ten kilometers underground, Europa's core changed dramatically - it became a world of holes.

The zigzag tunnels are connected, each of which is more than five meters in diameter, forming an incomparably huge labyrinth.

Europa's core has been completely drilled by aliens, and its diameter of 3,000 kilometers is only 2,000 kilometers that have been transformed by aliens.

They have created a complex "city" beneath the ground, with holes intertwined leading to the center of the earth, where a large number of bugs are hiding.

The activity of the Scout Spirit Weapon was soon discovered by the Xenomorph as well, and the blue points of light were extinguished, and a holographic map covering half of the Earth's center was drawn.

Looking at this complex map, the generals of the expeditionary force looked at each other. The reality was far beyond their expectations, and now it seems that the methods of underground warfare will have to be revised.

"This time it's a tunnel battle, what should I do?"

Zhang Binhui looked at everyone, as a top soldier and a commander, he is already very mature, but if it comes to tactical details, this still needs a lot of precipitation.

The Chief of Staff was the first to speak:

"These tunnels are too complicated, I just carefully counted, the length of the tunnel is more than 100 meters, it must have a turn, which puts forward extremely high requirements for the flexibility of the assault force. There, our troops will be completely at a disadvantage.

The most important thing is that there are too many holes in each tunnel, creating an environment that is easy to defend and difficult to attack, and our troops are easily outflanked by the other side, and I am afraid that there will be a trap below. ”

Yan Chengjian also put forward his opinion: "The terrain is too complicated, if we want to control the periphery of the tunnel, and then advance layer by layer, our troops are seriously insufficient.

The most important thing is that even if we implement this tactic, our defensive strength is not strong enough, and it is very easy for the opponent to concentrate forces to break through, and eventually there will be a situation in which the enemy is attacked on the back of the enemy. ”

The analysis of the two hit the crux of the battle situation, no one expected that the alien could completely transform a planet in such a way, a complex crater body with a diameter of more than 2,000 kilometers, and if you want to attack it, it is like pouring water into it, and no amount of water is enough.

Zhang Binhui also felt a headache, as if he saw the development of the future war:

The expeditionary force marched wildly, but had to start dividing its troops into the hole, and at the end, suddenly a large number of alien troops came out from behind them, and then all the expeditionary force troops were trapped and died underground.

"How about we block them?" Yuan Yuanzi was straightforward and fast-talking, and he opened his mouth to say it, but when he looked back, the range seemed to be too large, so his mouth was closed again.

Zhang Binhui smiled and thought: This alien has mastered the escape technique, leaving the pit, they move freely, but the speed is a little slower, blocked, can it be useful?

Just as he turned to another train of thought, there was a sudden light in his mind, and something seemed to flash, but it suddenly disappeared, so Zhang Binhui began to search for the "bright light" just now.

Ma Tianyuan clicked on the map:

"After the previous war, combined with the reconnaissance situation, I believe that the number of aliens will not be too much, and in terms of numbers, we should not be at a disadvantage.

I would like to suggest that maybe we can create a decoy tactic. ”

Hearing him say this, everyone's ears pricked up.

"We can split our troops in two, and the two forces will complement each other, and when the aliens attack us, they will also get caught in our flanks, and eventually there will be a decisive situation, so that our pressure will be much less."

Ma Tianyuan said that this method was very risky, after he said it, everyone fell into deep thought, some people nodded, but more people's eyebrows wrinkled.

After all, once the troops are divided, the risks taken by the expeditionary force immediately skyrocket.

But Ma Tianyuan's method woke up Zhang Binhui, and his eyes lit up.

After carefully studying the map of the center of the earth again, a mature and bold plan appeared in his mind, and he finally understood why he had realized it before.

"Everyone, be quiet, and listen to my plan first."

When everyone quieted down, Zhang Binhui said his plan:

"Just now Yuan Yuanzi and General Ma reminded me that we can indeed adopt the combat strategy of blocking and dividing our troops."

Yuan Yuanzi was stunned for a moment: Still blocked? Countless holes, how to plug them?

Zhang Binhui smiled, his finger pointing directly at the center of the earth:

"What is our goal? Kill every female worm on Europa; What is the alien instinct? Protect every female worm.

In this case, our strategic commonality with the alien emerges.

Our troops don't need to plug every hole, because as long as we target the mother worm, the aliens can't run around, and they will definitely be affected by the direction of our attack and eventually be mobilized by us. ”

As soon as these words came out, everyone suddenly realized, and their eyes began to light up.

Zhang Binhui went on to introduce: "So in this way, the direction of our attack is easy to determine, pointing directly to the center of the earth, and the mother worm will definitely stay near there."

As long as we move forward firmly, eventually the Xenomorphs will not have the energy to outflank us, they will have to hold up in front, so that our tactics will be much simpler. ”