The movement of the three regiments was difficult, but the movement of the first regiment was smoother than expected, and the soldiers descended layer by layer along the ropes fixed to the rock wall, although the speed was a little slower, but it was better to be safe.

The mechanical spiders were much faster than the fighters, and the troops had just descended more than two kilometers before the mechanical spiders had climbed to the bottom of the well.

This time, Xiao Yuan was finally able to take a good look at the situation at the bottom of the shaft, and found that the bottom of the shaft was a huge underground space, with a high vaulted dome and flat ground.

The corpses at the bottom of the well and the aliens who carried the corpses were all gone, and if it weren't for the fact that there were still many congealed blood stains on the ground, there would be no indication that there had been a major battle here not long ago.

Xiao Yuan was very taken aback, he had moved so many corpses so quickly, and there must have been a lot of troops left by the aliens below, which made him hesitate a little, not knowing whether he should continue to go down.

It's not that he's timid, it's that the structure of the airport is too dangerous.

The main body of the airport is like a big bowl upside down on the ground, and the shaft is in the middle of the bowl, and the enemy only needs to arrange the troops around the bottom of the bowl to surround the shaft.

Before Xiao Yuan could come up with a countermeasure, the mechanical spider that climbed out of the shaft suddenly saw a big ice-white guy, which was a giant ship that failed to leave the port!

Xiao Yuan's eyes were dark, and he almost fainted on the spot.

It's a huge ship, although the firepower of this thing is not as strong as a battleship, but no matter how weak it is, it is a spaceship, and the enemy doesn't need to arrange any encirclement at all, as long as the giant ship fires a few volleys at will, it can sweep away any enemy who burrows into the airport.

Fight the ship with infantry? Finding death is not such a way to find it!

Xiao Yuan hurriedly contacted Ye Han: "No. 1, No. 1, I'm a group, please answer if you receive it!" ”

"I'm number one, please speak!"

Xiao Yuan quickly explained the situation: "No. 1, it's too dangerous to take the airport, I suggest giving up the original plan and finding another way." ”

"Looking for another way?" Ye Han's two eyebrows were almost raised into parallel lines, "Are you sure?" ”

The original plan was to follow the route of action of the multinational force and open a passage to rescue the trapped friendly troops, but he never expected that the multinational force would choose such a strange route, didn't they know how dangerous the giant ship was?

"I'm not sure." Xiao Yuan honestly admitted, "But no matter how sure you are, it's better than going down to die." ”

This reason is very powerful, really powerful, Ye Han had to nod: "You look at it yourself, I only look at the result and don't care about the process." ”

"Yes!" Xiao Yuan put down a big stone in his heart, and immediately ordered the troops to stop descending, and went into the nearby cliff cave to take shelter temporarily.

Then Xiao Yuan ordered the troops to recover the mechanical spiders, except for leaving a few to monitor the airport, the others went all out to explore the depths of the cliff cave.

As the spiders walked, they recorded their routes, and many branches were soon added to the map of the shaft, and as the spiders traveled, some of the caves gradually joined together, becoming several branches on one main cave, and some of them gradually drifted apart, and finally connected to two different main caves.

According to the current situation, there are less than a dozen branch holes on a main cave, and more than thirty or forty branch holes.

As long as the main cave is cut off, all the branch holes can be controlled, Xiao Yuan immediately asked the troops to check all the branch holes, and then move the interception point set in the branch hole to the main cave.

Then Xiao Yuan reported this new situation to Ye Han, and reported to the three regiments in time, and the two regiments joined forces to explore the cliff cave together.

After a while, Xiao Yuan and Long Jianguo determined that there were a total of sixteen main caves around the shaft, and the distribution of these main caves was very regular, and they could be roughly divided into upper, middle and lower layers according to the direction, and the upper layer extended upwards and seemed to lead to the ground; The horizontal expansion of the middle level, which does not know where it leads; The lower level goes deep underground, most likely leading to the depths of the earth.

Xiao Yuan found that the direction of a lower main cave seemed to lead to the direction of the No. 1 target, and after he reported the situation to Ye Han, he immediately ordered the troops to assemble in this main cave, which was also temporarily named the No. 1 passage.

There are seventeen passages connected to the No. 1 passage, and the soldiers of the first regiment are concentrated in the branch cave as quickly as possible, Xiao Yuan rushed to the front with the guard squad, stopped only a few dozen meters away from the main cave, and ordered the troops to continue to reconnoiter the No. 1 passage.

Although the direction of the No. 1 passage was determined, due to communication problems, the mechanical spider did not go deep into the main hole, and it was not until they received Xiao Yuan's order that the soldiers manipulated the mechanical spider to go deep into the No. 1 passage.

Judging from the images sent back by the spider, the main cave is about four meters high, which is not much different from the branch cave, but the width is almost eight meters, which is more than twice the width of the branch cave.

The mechanical spider advanced more than three hundred meters along the main cave, but he didn't even see the shadow of an alien, and Xiao Yuan couldn't help but feel a little uneasy in his heart.

But then it was different, the first fork in the main cave appeared, and then the fork in the road appeared one after another, and the spider swarm divided and divided, and the electronic map that was originally like the root of a tree added many forks.

The uneasiness in Xiao Yuan's heart became heavier and heavier.

These cave tunnels are too suitable for defense, and there is no reason for aliens to give up such a good blocking terrain, but the aliens have taken the initiative to give up and retreat, which makes him think of Ma Hui's worries.

It's weird if you don't lure the enemy deeper!

Xiao Yuan didn't dare to order the troops to advance, so he contacted Ye Han again: "No. 1, No. 1, I'm a regiment!" ”

"I'm number one, please speak!"

"Division commander, the situation is not right, you can't go in any further!"

"If it doesn't work, just go another way." Ye Han said.

He must carry out the orders of his superiors, so even if he knows that the situation is wrong, he cannot let the troops withdraw, but how he executes it is completely free.

Xiao Yuan's face was full of bitterness: "In my opinion, it's the same whether you change it or not, the enemy is deliberately hiding and waiting for us to go inside......

Before he finished speaking, the communication soldier behind Xiao Yuan suddenly shouted anxiously: "Report, the drone is missing...... No, it's aliens, aliens destroy drones! ”

Xiao Yuan jumped up: "Where is it?" Where are the aliens? ”

The signal soldier immediately replied: "The main cave, six hundred meters away!" ”

"Where's the quantity?"

"The number is unknown, and there are no spiders before I can see clearly." Said the communications soldier.

"Then what are you waiting for, send another batch in!"

"Yes!"

"It's finally out!" Xiao Yuan let out a long breath, and his eyes fell on the main cave more than ten meters away, "Attention of all units, immediately block the tunnel, focus on blocking the fork in the road, and go out to block the main tunnel in a row, execute it immediately, quickly!" ”