Luo Tian entered the operations room, put on the body-sensing suit, sat in the immersion cabin, and entered the Kaiyuan Uranus City.

He quickly approached the battlefield in the dedicated battleship Tianwang. The data uploaded from the battleship's reconnaissance system to the monitoring screen showed that there were indeed no obvious enemy ships.

"This is really weird? It's impossible that there are no enemy ships and our attack ships suddenly decrease!" Luo Tian wondered.

Gao Shan's voice came from the battleship communicator: "Your Majesty, please send me the coordinates. Sen will bring the battleship to protect you."

"Don't let him bring too many. Two will be enough. A target that is too big will be easily discovered." Luo Tian reminded, and then sent the coordinates to Gao Shan.

Since he couldn't find the problem, Luo Tian decided to retrieve the detailed data. He retrieved all the images of the current environment of the Star City and the attack ship being attacked, and carefully looked for any anomalies.

From the footage of the attack ships disappearing, it can be inferred that they were not attacked by lasers or missiles, but that the warships' engines were directly engulfed by the explosion caused by the impact.

What’s even more terrifying is that this kind of impact will directly penetrate the defense system, as easy as a sharp knife cutting vegetables or melons.

"If it can directly penetrate the magnetic field, the attacker must also have a magnetic field." Luo Tian analyzed and called up the environmental magnetic field data, and indeed found something abnormal.

The magnetic field data of the current environment has some deviations from the normal value, which cannot be seen without careful observation. However, at some special points, the deviation is very large, which means that there is an object in the space that is invisible. Not only can it not be seen visually, but even the detection system cannot judge it. When it moves, the magnetic field of the point is disturbed and changes dramatically, but the overall magnetic field does not change much.

At this time, the warship's communicator rang, and Sen requested a call. Luo Tian turned on the communicator and heard Sen's voice.

"Your Majesty, I have brought two warships to protect you."

"You have been on the front line battlefield all the time. I want to know the current situation." Luo Tian asked.

"Our fleet is currently under attack by unidentified objects. We have lost one-third of our fleet and more warships are being destroyed. If this continues, we will be wiped out in less than half an hour," Sen replied.

"I've just looked at the magnetic field data. Saturn City has sent out a stealth warship that can neutralize the defensive magnetic field of our warships and evade tracking and detection by the reconnaissance system. Now we are completely at the mercy of others. We must get the fleet of Milan Town to withdraw from this area. You convey the order to the fleet now, and I'll talk to Gao Shan as well." Luo Tian said.

"Yes, sir!" Sen immediately ordered the warships to disperse to star towns such as Titan and Ari.

Luo Tian quickly called Gao Shan, shared his findings with him, and said, "We set a trap for Saturn City, but they also set a trap for us."

Gao Shan finally realized: "So those warships that we were asked to destroy were actually baits, just to lure our warships together, and then let the invisible warships catch us all in one fell swoop."

"That's right, so I asked Sen to redistribute the warships to various star towns. Other methods must be adopted to deal with invisible warships. A strong attack is definitely useless." Luo Tian said.

"I understand. But once the warships withdraw, it will be equivalent to handing over Milan Town to Saturn City." Gao Shan said.

"It doesn't matter. There are no residents here anyway. It's an empty city. If Saturn City wants it, let them occupy it first. Once we figure out a way to crack the invisible battleship, we can drive them away." Luo Tian said.

"I understand. Our top priority now is to retain our manpower. If we lose all our assets, we won't be able to seize the opportunity to counterattack even if it really comes." Gao Shan said.

"Yes, so let's withdraw all our military forces from Milan Town, and we will launch a general attack when the time is right." Luo Tian ordered.

"Yes, sir. I'll arrange it right away!" Gao Shan replied.

Luo Tian and Sen were patrolling the periphery of Milan Town in their warships, and saw that the warships of Uranus City were withdrawing quickly. The stealth warships of Saturn City were still attacking the fleeing attack ships, but only a few were destroyed, and most of the warships successfully evacuated Milan Town.

At this time, Sen's voice came from the communicator: "Your Majesty, all the warships in Milan Town have been evacuated. The invisible warships did not catch up. Now the sky is silent."

"Okay, we'll leave one or two reconnaissance ships to patrol the air and keep an eye on the situation here. If we find anything abnormal, report it immediately." Luo Tian instructed.

"Yes, Your Majesty. There is one more thing. We have discovered a large number of mechas on the ground. They are heading towards the central building of Milan Town. It seems that they are going to occupy the entire Milan Town." Sen said.

"These troops are most likely from invisible battleships. After occupying Milan Town, Saturn City will definitely announce that the entire Uranus City has been captured by Saturn City. Then they will force us to negotiate and sign a treaty to cede territory and pay compensation, and nominate Roger to power. Therefore, we must not let Saturn City succeed." Luo Tian analyzed.

"Don't worry, Your Majesty. We will keep a close eye on every move of Saturn City. Whoever fails to keep an eye on them will be the first to be punished," said Sen.

"Okay, I'll leave this to you for now. I still have to find a way to crack Saturn City's invisible battleship." Luo Tian said.

In order to come up with a way to defeat the invisible battleship, Luo Tian called Yelena, Harry, Gao Shan, Jiu Hai, Dugu Yun, Lorraine and others to a meeting, focusing on how to quickly find the invisible Saturn City battleship and completely reverse the situation on the battlefield.

"Invisible warships are not a complicated technology in Kaiyuan. I have seen how other star cities make invisible warships before. But this technology is prohibited from export, so Uranus City cannot master it." Yelena said, "The easiest way at present is to invite the Survival League to export this technology to us, as well as methods to defend against this technology."

"Leave this matter to Yelena and Lorraine, and try to complete the technology transfer as soon as possible." Luo Tian ordered, "Without obtaining the technical authorization of the Survival Alliance, if Saturn City attacks various star towns, what can you do to stop Saturn City?"

"I have a secret weapon to deal with invisible warships. Your Majesty, please send me out to fight them. I can definitely beat them to a pulp." Jiuhai said.

Luo Tian remembered that Jiu Hai did know a lot of advanced techniques and methods during the Tianwu competition, so he could send him to try.

"In fact, invisibility is the use of magnetic fields to cover and conceal oneself. I think we can develop a method to identify these invisible warships as soon as possible. It may require changing the algorithm, or looking for inspiration from the environment." Harry said.

Luo Tian didn't expect that everyone could come up with so many methods. No matter which method it is, it is worth trying. ?