"There is a situation!" Without thinking about it, the programmer immediately shouted on the radio, reminding everyone that this was not a false touch, but a real alarm.

Several programmers worked as fast as they could to locate the sound source, and had just determined that the sound source was to the left of the Dead Sea, and a similar sound source was found in the direction of the South Sea on the other side and raised an alarm.

Not an accident, this is definitely not an accident, but another counterattack of the enemy!

Ye Han had a loud alarm bell in his heart, and he opened his throat and shouted: "Attention of all units, strictly guard against it-"

His attitude is unprecedentedly dignified, aliens are good at digging holes, and it is not strange to dig tunnels close to the base area, but the last wave was a ground attack, and this wave was changed to underground, indicating that the enemy knows very well the advantages and disadvantages between the enemy and us, and the reason why he chose to dig underground is probably to resist artillery bombardment!

No, not only the artillery bombardment, but also the air strikes from the warships, as long as you hide underground, you can avoid the heavy weapons of the humans, thus greatly reducing the casualties of the noble army!

The plan is not as fast as the change, Ye Han quickly made a decision in his heart: "One regiment and two regiments, the troops are temporarily suspended!" ”

"A mess of understanding!"

"The second regiment understands!"

"Listen to the team, keep up to date with the latest situation!"

"Yes!"

After issuing several orders one after another, Ye Han let out a long breath, glanced at the satellite map, and suddenly felt an indescribable irritability in his heart.

The enemy is coming too fast!

Ye Han didn't think about the current situation, but it was precisely because he thought about it carefully that he knew more about the hidden worries behind the attack.

If you think about it carefully, it is not difficult to find that when the listening network heard about the anomaly underground, the position of the enemy army was not far from the encirclement.

It's true that aliens are good at digging, but if they want to dig under their noses outside the sight of the defenders, they can't just dig to get there. This means that the enemy's excavation operation has not just begun, according to Ye Han's estimate, I am afraid that the last round of attacks has not yet ended before the excavation has begun.

If there was no need to dig tunnels, would the attack of the noble army have already begun?

It is strange that the combined forces of humanity and the Resistance have successfully landed, and that the noble army is not in a hurry, and it is not surprising that they have launched a continuous and continuous attack on the base area.

But the premise of all this is that the coalition forces are strictly guarded and do not step out of the base area, and the landed coalition forces make the noble army like a fish in the throat, and they will not be able to sleep without destroying the aliens of the coalition army.

But what is the current situation? It was the coalition army that had just landed, and the main force of the servant army took the initiative to break the encirclement of the aristocratic army; It was the aristocratic army that surrounded it, and most of the defending coalition forces were annihilated; It was the destruction of all the underground bunkers located inside the base area; It's the forces of the al-Qaeda group that have stormed the interior of Ganymede!

To put it bluntly, the coalition forces have gained a firm foothold on the surface of Europa, but they have not shown any intention of continuing to go underground, at this time, the first target of the noble army should be Albert's landing force, even if the noble army is not short of men and does not need to draw troops from the vicinity of the base area, then it should first deal with the main force of the servant army advancing in the rapids.

It is true that the aristocratic army has been trying to block the main force of the servant army, but the results are limited, no matter how you look at it, the top priority is to concentrate more superior forces and defeat the main force of the servant army in one fell swoop.

But the choice of the aristocratic army is to attack the base area!

So what was the intention of the aristocratic army? Cut off the back of the main force of the servant army? Cut off the support of the servant army from the base area? Or do you have other ulterior motives?

Ye Han had a headache, and if he couldn't find a reason, he couldn't accurately judge the enemy's intentions, and now all he could do was to block the soldiers and cover it with water.

So after thinking carefully, Ye Han issued a new order again: "One regiment and two regiments, I am the number one, I order you to immediately organize manpower to plant nuclear mines outside the encirclement, pay attention to the distance, and execute it." ”

Although Ye Han's order did not explain the reason, Xiao Yuan and Bian Ge realized that Ye Han was targeting the enemy of the underground excavation, and the two of them agreed in unison and immediately arranged for people to carry out the order.

Soon, more than a dozen squads operating in squads broke out of the encirclement and placed nuclear mines about 1,300 meters away from the encirclement, and a sufficient safety distance was opened between any two nuclear mines.

As long as these mines are detonated, the shock from the explosion will not dare to destroy the enemy's underground communication network, or at least it will cause some trouble for the enemy and delay the follow-up troops.

Just when the various detachments were in full swing, Ye Han suddenly received a report from the monitoring team: "No. 1, an anomaly has been found outside the Dead Sea, the depth of the sound source is twenty meters, the distance is forty meters, the depth is rising, and the speed is very fast!" ”

Without waiting for Ye Han to speak, the monitoring team reported again: "On the outside of the Nanhai, the sound source is eighteen meters deep and seventy-five meters away, and it is digging upward!" ”

"The inside of the Shahai, 14 meters deep, 55 meters away, parallel excavation ......"

Ye Han was a little stunned, why hadn't there been any movement before, and suddenly there were so many abnormal sound sources?

How did he know that this was actually the result of the monitoring team completing the optimal combination of monitoring programs to improve the monitoring efficiency.

Ye Han realized that the situation was not right, and quickly called up the plan of the base area, on which the monitoring team had marked the location of all sound sources and the direction of tunneling.

He immediately noticed that all the sound sources were within a hundred meters of the battleship and within twenty meters of the depth, and the direction of all the sound sources was pointing towards the battleship!

Ye Han immediately became alert: "Attention units, prepare to fight!" ”

The satellite map can only see the ground, the enemy turned underground, Ye Han can no longer grasp the battle situation as before, but this map shows the underground situation in front of Ye Han, and gives him a basis for judging the enemy's situation again.

At this time, the various teams that went out had already completed the mine-laying mission, and if the sound source was not too close to the battleship, he would definitely immediately detonate a few nuclear mines to give the enemy some color.

As soon as the order was issued, the monitoring team reported again: "Report, the No. 4 sound source in the direction of the Shahai has disappeared!" ”

Ye Han suddenly made a wit: "Where did the sound source disappear?" ”

"Thirty meters outside the Sand Sea, six to eight meters deep."

As soon as Ye Han's gaze fell to the position where the sound source disappeared, the voice of the monitoring group appeared again: "Report, the sound of No. 2 in the direction of the Dead Sea has disappeared, at a distance of twenty-six meters, and at a depth of six to eight meters!" ”

"Report, Nanhai ......"

"Report, Red Sea ......"

All the reports were the same, all of them were the sound source disappearing, the distance was within thirty meters, and the depth was all six to eight meters!

Ye Han almost heard the alarm in his mind, and he immediately yelled on the radio: "All attention......

As soon as he shouted these words, more than a dozen dirt bags suddenly bulged out on the outside of the Shuhai, and there were also earthen bags bulging in other directions, seven or eight in the front and back, and a dozen or so on the inside.