Chapter 531 The Underground Battlefield

hc23 war zone.

Death e star, underground fortress.

Yan Xia looked around, looked at everyone's solemn expression, and also integrated into the tense atmosphere of the battle.

They were in a black area. If there was no lighting, there was no light here, only infrared rays emitted by creatures.

In order not to be discovered, dense jammers were installed here, which not only made many detection equipment unable to operate, but the energy here itself was extremely chaotic.

Here, everyone can only fight in the dark.

Since a war 886 years ago, the ground was bombed to pieces, and the orbital guns in the sky began to take action, making the ground space even more dangerous.

After that, there was a war silence that lasted for about 40 years. Both sides chose to dig underground space to extend to each other's camps.

The war started again, but it was underground.

After hundreds of years, a wide underground world was excavated from the mantle of the entire e star.

According to the scan, the size of the entire underground space is about 110 million square kilometers, with 17 main spaces, hundreds of small underground spaces, and countless underground tunnels.

The 17 main spaces are named X1~X17, and the remaining small spaces have corresponding serial numbers. For example, the extended small space of X1 is X1-E1 if it is in the east.

Among them, X3~X7, X11~X13 and X17 are occupied by the Star Alliance at this time.

Yan Xia led others to guard in X12-S4, which covers an area of ​​only 270,000 square kilometers.

Because the war shifted 20 years ago, this place was forced to become the front line.

The team originally led by Yan Xia suffered heavy casualties here.

There are only 1,322 people left alive now.

You should know that when they first came, the entire 276th Corps had 6,000 people.

"Boss, there is no response from the northern underground sentry tower. The enemy's main force is estimated to have reached the south side of the Donghe River."

The Donghe River is an underground river dug out of the underground space. Although there is no water on the surface of this Death Star E, there is still some water under the stratum from the formation of the planet in ancient times, of course not much.

The cave river is called a river, but it is actually a small pond with a diameter of less than 100 meters.

The entire X12-S4 space is relatively narrow and long, like a chicken claw, and the cave river is less than 3 kilometers away from them.

There is no gas on the e-star, so even if it is less than 3 kilometers away, they cannot hear the movement over there, and can only guess at this time.

The communication between the sentry tower and them is mainly done by a fixed laser pen.

Every once in a while, they will confirm each other's status, and the northern underground sentry tower did not send information at the specified time, which means that something has happened.

"Are you here?"

"You lead people to reach point 4 along the underground tunnel. It is expected that they will come down from the north along this ditch, or from above."

"After setting up a disc-shaped machine gun at point 4, use the spider to get here. As long as the machine gun moves, you will directly cover it with firepower. They will not disperse underground, and there must be a lot of people coming."

Yan Xia gave the other party a task.

The butterfly machine gun can provide intensive firepower coverage in all directions, and can also perform very subtle detection in this complex environment. The detection range is about 150~200 meters, and the error depends on the strength of the surrounding interference.

Spiders are an inverted device.

They can walk on the top of the underground space. They are very small and are used to surprise the enemy most of the time.

"Good!"

The other party took 50 people away.

This is enough.

The entire underground space is not large, especially because of its shape, the area is relatively narrow and long.

The firepower coverage of 50 people, if taken by surprise, can even destroy a team of 1,000 people.

People are very scarce on Star E. 1,000 people can basically make the opponent suffer a lot and unable to organize the next attack for decades.

Generally speaking, a team of 500 people is considered a lot.

After this team left, Yan Xia took 100 people to another upper passage.

The passage over there is relatively narrow. For safety reasons, the probability of the other party going over there is only 20%.

There is an 80% chance that someone will come to the passage above.

That is a passage above their heads. In principle, it does not belong to their space, but to the X12-S1 space.

However, the underground space is interconnected, and many places are connected. The other party can come here through that passage.

The passage is 367 meters above their heads.

To get into the passage, you need to go around.

After spending 10 minutes to reach the top, Yan Xia has already been familiar with the surrounding environment. This passage was actually blown out by their 276th Corps.

There is bedrock all around here, which is very solid.

They arranged more than 3,000 triggered infantry mines inside the passage.

These mines are not filled with gunpowder, but positive and negative matter.

After the mine is triggered, the positive and negative matter will be annihilated, and the mine itself will instantly generate a super strong gravity, concentrating a large amount of energy in a limited range.

Its explosion range is 10 meters in radius, the center temperature can reach 60 million degrees Celsius, and the edge temperature can reach 2 million degrees Celsius.

Although the edge temperature is not enough to damage the most advanced mecha in the Federation, the center temperature is enough to damage the mecha.

After the mecha is damaged, the remaining energy can flow into the damaged point and burn the people inside to ashes.

This kind of mine is actually very low-level.

If it is on the ground, basically no one will use it.

But this is underground, darkness, energy interference, information interference, countless factors added together, everyone is blind.

However, the opponent will also send robots to clear mines in advance, so these 3,000 mines only have a deterrent effect. To really kill the opponent, you still need your own firepower.

Yan Xia asked everyone to set up artillery to welcome the arrival of the enemy.

He himself installed a ground vibration detection device, and everyone had to leave the ground at this time.

Although there is no air transmission of sound, the ground can.

The moment the ground vibration detection device was installed, countless vibrations were detected. This is because the bases of both sides continuously released energy into the interior of the e-star in order to interfere, which not only disrupted the magnetic field of the entire e-star, but also caused the entire planet's matter to resonate.

Fortunately, Planet E is large enough and the vibration is very small, so it avoids being shaken apart.

This planet is more abnormal now than it was thousands of years ago.

Yan Xia wants to find the enemy part of these chaotic vibrations.