The sudden change made Mo Yu's nerves tense instantly.

Hearing Wang Long's shout, Mo Yu immediately turned around and shouted towards the area where the row tents were set up:

"Everyone prepares for war!"

There was a commotion in the underground square. The soldiers who were taking a rest quickly put on their equipment and walked out of the tent one after another, looking nervous.

Mo Yu then turned around and came to Wang Long in front of the metal passage, and asked:

"Brother Long, what's going on?"

"The black wind field suddenly expanded and it should cover this area. We are hiding underground and don't go out for the time being. You try to contact support first."

When he said these words, Wang Long's expression was serious, and his usual playful attitude was gone.

After listening to Wang Long's explanation, Mo Yu's expression became solemn.

Sudden expansion of the domain field is not common on the frontline battlefield, but it does occur occasionally.

This is also the main reason why the construction team chose to build the temporary research station underground, so that even if the surrounding field suddenly expands, there will be buffer time.

The expansion of dominant fields is generally caused by the controlling forces in the field wanting to expand their sphere of influence, or starting wars against forces in other surrounding fields, and wanting to plunder the resources of other forces.

Without too much emotion, Mo Yu immediately picked up the communicator hanging on his waist, adjusted the channel and said:

"Xiao Kong, please try to establish contact with the supply area and seek support."

After a brief silence on the other end, Yan Kong's voice came:

"Contacting, but it seems that the top of the underground square we are in has been covered by the Black Wind Field. The signal transmission is very weak, but it should not be a problem to contact us."

"You try to contact me first, and then give me feedback after the contact is successful."

"good."

After ending the call, Mo Yu turned to look at Wang Long, and then slowly drew out the purple war blade hanging from his back.

It would be a lie to say that I am not nervous at this time.

But the nervousness did not affect Mo Yu's mentality. This was not the first time he encountered a similar crisis.

Besides, being underground at this time, the probability of being discovered is very low.

Even if it is discovered that as long as the metal passage is guarded, there will be no problem. Unless the forces controlling the Black Wind Field create several passages by digging, they will have an absolute terrain advantage.

While waiting anxiously, all the soldiers looked solemnly, looking at the metal passage in the distance and waiting in full formation.

In the silence, Mo Yu could even hear the heavy breathing of the soldiers around him.

At this time, the soil above was trembling, and dust was falling down along the cracks in the ceiling. It seemed like there were thousands of beasts galloping past above.

A feeling of depression came over me.

"Damn it, I haven't married yet, so I won't die, right?"

At this time, a young warrior with a young face swallowed his saliva and said nervously.

"Earthworm, shut up. I haven't even married yet, and your hair hasn't even grown yet. What a shame." Wang Long couldn't help but turn around and cursed with a smile after hearing these words.

When everyone heard this, they burst into laughter, and the depressing atmosphere was relieved at this moment.

"Brother Long, I have a sister, do you want to introduce her to you?"

"Brother Long, I have a sister, what do you think of her?"

"Brother Long, my old mother is 55 years old, single and retired. What do you think..."

…

Hearing everyone's joking, Wang Long couldn't help but curse, and then roared:

"Shut up, everyone. Anyone who wants to introduce me to my sister or sister will wait until we get through this crisis. Now cheer up."

As he said this, Wang Long turned around and looked at the metal passage in the distance, and the amusement on his face disappeared.

Lifting the crimson battle axe, Wang Long's aura changed in an instant, like a hungry tiger, dormant and waiting for the prey to appear, and then roared to attack.

Time passed while waiting, and the accident never happened.

But no one dares to slack off at all, because a crisis may occur at any time, and it will be too late to react by then.

Five hours later.

The always tense crowd still gathered in front of the metal passage.

At this time, Mo Yu's portable communicator flashed, and after the hissing sound, Yan Kong's voice came:

"Brother Yu, we have contacted the supply area and have reported the situation here. The office said that it will investigate the situation at the Black Wind Field as soon as possible and then formulate a support plan."

"Well, keep in touch with the supply area and report any situation at any time."

"clear."

After hanging up the communication, Mo Yu was about to finish speaking when he saw Wang Long standing in front suddenly turned his head and looked at him:

"Feather, it's not the same thing that we have been waiting here all this time. You divide the battle group into two groups, and each group rotates every 12 hours. You take a group of brothers to rest first, so that even if there is an emergency, we can respond quickly."

Mo Yu did not refuse Wang Long's proposal and immediately nodded in agreement.

As Wang Long said, only by taking turns can we maintain sufficient energy.

At this moment, he turned around and began to group the warriors present according to Wang Lung's instructions.

Among them, the soldiers who were on duty just now were put into the second group and started to rest first.

…

One week later.

Mo Yu, who was wearing combat uniform, opened his eyes and looked up at the clock on the desk. He immediately bent down and stood up, deciding to go and exchange with Wang Long.

Without taking off his combat uniform, he reached for the purple war blade placed beside the bed and walked out of the tent.

After blowing the flute, the soldiers in the second group walked out of the tent one after another, began to assemble, and then walked towards the metal passage under the leadership of Mo Yu.

After the exchange was completed, Mo Yu stopped Wang Long, who was about to go back to rest, and called him aside.

"What's wrong?"

Facing Wang Long's inquiry, Mo Yu's expression was serious:

"The latest reply from the supply area three hours ago. The Black Wind Field is expanding very quickly. Our location is five kilometers away from the latest boundary of the Black Wind Field. The support force that can be mobilized is limited.

, they have already fought against the Black Wind tribe in the Black Wind Domain, but they have not gained any advantage. It is impossible for them to enter the Black Wind Domain in a short time to help us leave."

After hearing these words, Wang Long's expression became serious, and then he asked:

"How long can our food last?"

"If we want to maintain combat effectiveness and distribute it appropriately, the food can last for a week at most. We don't have much time left."

After listening to Mo Yu's analysis, Wang Long was silent for a while and then nodded and said:

"If we persist for another four days, if support has not arrived, we will have no choice but to break out."

"You should go rest first and wait for news from the supply area before making a decision."

"Well, I'll leave this to you." Wang Long patted Mo Yu's shoulder, then turned and left with the battle ax on his shoulder.

After Wang Long left, Mo Yu returned to the metal passage and stood still.

Looking at the metal passage shrouded in darkness, he had a lot of thoughts in his heart.

He knew exactly how risky it would be if he chose to break out.

The top is already covered by the Black Wind Domain. If you choose to break out, you will most likely be surrounded by the Black Wind Clan. It will be almost impossible to escape by then.

Although promoted to A-level battle group.

But relying solely on the comprehensive combat power of their battle group to confront the Black Wind clan who control a field is undoubtedly a wishful thinking.

Choosing to break out is equivalent to risking your life.

But he understands one thing better. If they don't choose to break out before the food is consumed, and when the food is exhausted, they will not have enough physical strength to break out even if they want to break out. By then, the probability of success in breaking out will be greatly reduced.

Although the risk of breaking through is extremely high, compared to sitting still and waiting for death, at least we have the initiative.

The only thing he can hope for now is to mobilize soldiers from the frontline supply area as soon as possible and launch an active war against the Black Wind Field.

But this is unlikely.

After all, the frontline supply area is a multi-line operation. The entire battlefield is centered on the supply area. Fission spreads out multiple multi-battle routes. Many battle groups are performing tasks in other areas. In many cases, signals from the supply area cannot be received. Think about it.

It takes time to even come forward to support.

After analyzing the current situation, Mo Yu already agreed with Wang Long's decision.

They must prepare for the worst.

…

Four days later.

All the soldiers of the Preparatory God of War Regiment gathered in front of the metal channel under the leadership of Wang Long.
To be continued...