With Aaron controlling the "Shadow", there is no need for Yang Yi and others to take risks.

It's just that Lin Feng didn't act blindly, first asked Carl for the digital map of Prometheus Star, and then asked Aaron to release several small probes. After figuring out the enemy's encirclement and deployment, Aaron set up a relatively safe reconnaissance route.

Fortunately, the "Shadow" itself is a reconnaissance ship, and it is still the most advanced reconnaissance ship of the Human Federation.

Although the tonnage of the "Shadow" is small, not even comparable to the smallest frigates, but for reconnaissance ships, small is an advantage. For example, the Shadow is capable of flying in the atmosphere, and even if its maneuverability is not comparable to that of a fighter, it is good enough for ordinary reconnaissance missions.

When Lin Feng set the reconnaissance mission program for Aaron, Yang Yi, Shen Chengwen and Jackson took other officers and soldiers to go around the base accompanied by Carl.

The base is large, with an area of about 350 square kilometers, which is equivalent to a large city.

It can also be seen from this that thousands of years ago, after the occupation of Prometheus Star, Marshal Sean made a grand construction plan. If the construction work is completed, this base alone will be able to accommodate nearly 10 million officers and men of hundreds of legions, and will also be able to support thousands of warships.

It's a pity that a lot of construction was not completed, especially the ground facilities.

What's even more unfortunate is that for thousands of years, there have never been more than 100,000 soldiers stationed here, and when the Silicon Phantom Legion launched its attack, there were only about 30,000 officers and soldiers here.

30,000 soldiers, guarding a military base with an area of 350 square kilometers. Apparently too little.

"In order to shorten the defensive line, we had to abandon the outermost positions." Carl had not been in a good mood, especially as he passed through the field hospital. "Even so. Troop strength remains very tight. As you can see, the field hospital is already overcrowded, and it's only been three days. If this continues, we will be able to hold out for a maximum of five days, and then we will have no troops to use even if the enemy does not attack. ”

"Where's the ammunition?" Jackson asked.

"The ammunition is still sufficient, and the supplies are enough to last more than half a year." Carl smiled reluctantly. "It's just that none of the ammunition we have in reserve can effectively kill or injure the enemy. This is especially true for heavily armored targets such as Ironclad Furiousness. If it weren't for the fact that the enemy had not always put in the attacking troops, I am afraid that our defense line would have been broken long ago. ”

"Those tanks ......"

"Only three of them were functional, and the other few had a power system failure and were unable to walk. It can only be used as a fixed fire point. Carl shook his head with a wry smile. "In order to cope with the enemy's attack, we have used all the weapons we can find, especially heavy weapons. There are now about 200 small-caliber cannons, all mounted on air-cushion vehicles. It's just that the line of defense was too long, and there was no way to know from what direction the enemy would attack next, so I had to concentrate these forces to form a mobile rescue force. Although all the most elite officers and soldiers. But the combat casualties were significant, and the front-line commander had already returned three. ”

Jackson sighed to himself. Didn't ask any more.

"Reactive defense is not the way to go."

"I know, but what else?"

Shen Cheng also sighed when he heard it, and didn't say any more.

"You have to take the initiative, and the best defense is to attack." Yang Yi glanced at Carl and said, "Of course, you can't be in a hurry, you must first figure out the enemy's troop deployment." In addition, our forces are very limited, and even if we can repel several enemy attacks by counterattacking, it is impossible to repel the enemy, at most let the enemy slow down the attack, buy some time, and hold out until reinforcements arrive. ”

Carl smiled reluctantly, of course he understood the meaning of what Yang Yi said, but it was not so easy to do.

"Don't worry, there's always a way." Yang Yi smiled faintly and said, "Our defense line is too long, which means that the enemy's offensive front is also very wide. The battle lasted for three days, the garrison had been on the defensive passively, and had been forced to abandon the outermost line of defense, and the enemy must have now relaxed his vigilance. By seizing an opportunity, you can inflict heavy losses on the enemy, making it difficult for the enemy to organize an effective offensive in the short term. ”

"But ......"

"The threat to the base is reduced, and we can free up our hands to do other things."

Carl was slightly stunned, and couldn't help but look at Yang Yi a few more times.

Although he didn't know much about Yang Yi, he still didn't believe that Yang Yi had a transcendent position in this team, but along the way, Jackson only looked at Yang Yi first, and Shen Chengwen also respected Yang Yi very much, Carl had to admit that Yang Yi was not the ordinary major officer introduced by Lin Feng.

It's just that he's a little too young.

Although Lin Feng is also very young, Lin Feng is the granddaughter of General Lin Xiaoting, and the current pilot of the "Fire Phoenix", two years ago, he had the combat power of a tenth-level soldier and has amazing talent, so it is not strange that he is the colonel captain of the special investigation team at the age of eighteen. But Yang Yi doesn't have any background, and he can't see how outstanding his talent is, and his combat power may not be strong. A young man like him, who is so ordinary that he can't find it when he is thrown into the pile, actually became a major officer of the special investigation team at the age of eighteen, and he still has a very high status, even Shen Chengwen, a squadron leader who has served in the special investigation team for more than a hundred years, has to be respectful.

Is this possible!?

Could it be that Yang Yi's background is very extraordinary, from a certain big family?

Carl was strange and thought it was unlikely. Lin Feng is the eldest lady of the Lin family, and what she can follow is obviously impossible to be a child of a big family.

"Colonel, let's go to the periphery."

Shen Chengwen proposed, Karl did not object, he also wanted to take Yang Yi and them to the outer defense line to have a look, so that Yang Yi and them had a more intuitive understanding of the battle situation.

Along the way, Yang Yi has been paying close attention to the observation and has also discovered the seriousness of the problem.

That is, the further you go, the fewer troops on the defensive line, to be precise, the density of troops.

The point is, temperatures are getting colder.

Previously, Carl had already made an introduction. They were able to hold the line and keep the enemy out of the base, and the cryogenic environment created by the ecological maintenance system powered by the S-class Origin Converter played a vital role. It can be said that the low temperature itself is a means of defense. According to Carl, the further you go, the cooler the temperature becomes. In the vicinity of the outer line of defense, the temperature dropped to about minus one hundred and fifty degrees Celsius. Not to mention the Silicon Warriors, even the human warriors are very uncomfortable and must wear E-level protective clothing to move normally. The problem is that there are not many E-level protective suits in the base, and there are a lot of losses, so the number of troops that can be deployed on the outer defense line is very limited.

In response to this problem, Karl developed a set of effective defensive tactics.

That is, when the enemy attacks, the defenders on the outer line of defense take the initiative to retreat, distance themselves from the enemy, and let the enemy occupy the outer line of defense. If the enemy continues to attack, resolutely resist on the second line of defense, exposing the enemy to cold temperatures at all times. If the enemy does not advance, the defenders will launch a counterattack after half an hour, and the enemy who has occupied the outer line of defense will be frozen by this time.

It must be admitted that Karl had a great talent for military affairs.

Although this tactic is not very glamorous, the effect is extremely significant. Over the past three days, Karl has not only held the line with his limited forces, but has also left the enemy with a mountain of corpses on the outer line. In addition, the defenders also made full use of the enemy's corpses, that is, after the enemy's corpses were completely solidified, they were used to build and strengthen forts and other defenses to resist the enemy's next attack.

"That's it ahead."

Carl stopped, but Yang Yi didn't stop, and continued to walk towards the looming line of defense in front of him.

Speaking of the defensive line, from a distance, it looks more like a low ridgeline. Of course, it was not a hill, but a pile of enemy corpses.

Shen Chengwen and Jackson didn't stop, and followed Yang Yi towards the defense line.

Carl sighed to himself and followed.

Although the temperature was very cold, it had no effect on Yang Yi and them at all. Protected by an energy barrier, the outside environment cannot have an impact on the soldiers.

Coming to the defensive line, Yang Yi still did not stop.

It wasn't until he came to a fortress and several soldiers rushed out of the bunker that Yang Yi stopped.

They didn't know Yang Yi, so when Yang Yi suddenly appeared, they were all taken aback. It's just that after seeing Carl who was following behind Yang Yi, they all calmed down.

Several servicemen did not salute Karl, this is the front line, and saluting the commander is tantamount to telling the enemy where to fire.

When Carl asked the officers of the fort about the situation, Yang Yi got into the bunker and inspected the situation inside.

It was not ideal, the bunker was built temporarily, the ammunition in reserve was pitiful, and it exuded a stench, not to mention only a few officers and men, even if a squadron of officers and men were deployed here, it might not be able to block the enemy's attack. Besides, those officers and soldiers were also in a terrible state, although they looked very determined, but they were exhausted, and they probably hadn't rested for a long time, and they might fall asleep at some point.

Only, there is no reason to blame them.

The high-intensity fighting lasted three days and three nights, and according to Karl, the enemy attacked every three hours, and all of them invested a lot of troops. With such a high combat intensity, not to mention ordinary soldiers, even soldiers of the special reconnaissance brigade may not be able to hold out for three days and three nights.

Apparently, the outer defense line of the base was crumbling.

Of course, this is also understandable why Karl adopted a defensive tactic of retreating as an advance. If you fight hard with the enemy on the outer defense line, even if you have an environmental advantage, you may not be able to block the enemy's attack, at least you will suffer more casualties and consume more troops.

The question is, how long will this tactic last?

Karl didn't dare to guarantee it, and no one dared to guarantee it.

Perhaps, when the enemy attacks again, the defense line will be broken and the base will fall.

In such a situation, how should this battle be fought!? (To be continued......)