Behind the building window, Claudia was looking at the sky worriedly. Suddenly, she felt John's hand increase in strength, and the temperature in her palm became as hot as flames.

Claudia looked at John, saw the eyes that seemed to be burning, and asked, "John, what's wrong?"

John said something that made Claudia froze in place, “I thought of a way to restore communication.”

Claudia was a little confused. John was an armored soldier before and did not understand communication technology. Now the experts in the technical department are in a state of turmoil. What can he think of? But out of trust in his childhood friends, she still asked, "What method? I can help you refer to it."

John rubbed his chin, organized the language, and said heavily, "Louyou's death row camp, do you know how they command the troops?"

Claudia didn't understand this and said in a little confused manner, "Psychic Power?"

"This should be the most efficient method, but the death camp is not, because Luo Yu has never found a suitable spiritual abilities in the death camp." John pulled his military uniform and pointed to a piece of colored fabric and said, "I have read in the intelligence department's research report that the death camp's practice is very primitive, that is, the 'flagship'! Use flags of different colors and horns of different frequencies to combine them together to command."

Banner! For the high-tech Federation, this is simply an antique-level or even primitive command method. When you say it out, you have to laugh at others. In what era, there are so many satellites in the sky, and you still have banners?

But think about it carefully, when high-tech communications lose their effect, the army becomes "blind", but are they really blind? No! Their eyes can still see and ears can still hear. The flag command does not require any technology, you only need eyes and ears, that's enough!

Claudia thought for a moment and said blankly, "Do you want to follow the command method of the death camp?"

John nodded heavily, "That's right."

"But" Claudia bit her finger and quickly explained the problem, "But no one of the front-line commanders of the Federation can understand the flag. This requires a long time of training, otherwise there is no way to understand what flag means what command or how many sounds means."

John did not deny that “Yes, we cannot convey the banner as precisely as the death camp, not to mention that we don’t even have the flag and horns, but we have you!”

Claudia was a little confused, "Me?"

"Yes, we have you!" John grabbed Claudia's hand and said firmly, "You only need to do one thing, go to the warehouse to find the pigment, inject it into the propulsion system, then pass through the battlefield, and control the trajectory to let the pigment present the symbol I specified in the air!"

"I can fly in a fixed path when I was doing this before." Claudia's expression was still a little confused. She looked at John and whispered, "But it's still the same question. Even if I can draw symbols in the air, how can the commanders understand the meaning of symbols in a short period of time?"

"This is the core problem. Our symbols must be simple and minimalist! We must be able to convey instructions in a way that everyone understands, so I chose the traffic light! Let's refer to the traffic light! Imagine that when you see three colors of red, yellow and green in the sky, the first reaction of a normal person is to stop, yellow standby, and green forward! I believe that those commanders can understand this in a very short time! So, we use the three colors of red, yellow and green to represent the action plan, represent the garrison, standby, and attack, and then use symbols to represent the troops and the action area!" John clenched his fists and muttered, and couldn't find a pen for a while, so he simply used his nails to clamp the pattern on the wall, "Look, for example, if we want the 1st Division to attack the b2 position of the sea war zone, then use green pigment to mark 5div-b2 in the air."

Immediately afterwards, John marked another mark, “If you want to subdiv, for example, let the 2nd Battalion of the 5th Division stand on site, then use yellow paint to mark 5div-2bat in the air.”

"For example, if a certain unit is evacuated, for example, the 11th Division blocks someone else's way or suffers serious losses, and needs to evacuate to the 121 area to maintain the renovation, we will use red pigment to draw 11div-121 in the air."

Looking at the example carved on the wall, Claudia was stunned. She glanced up and down for a while and said tremblingly, "It is feasible! At first, the commanders may not understand, but it only takes a very short time to adapt and they will understand that this is a command signal!"

John grabbed Claudia's shoulder and said firmly, "Yes! The communication system collapsed, the army was blind, but the commanders' eyes were not blind! They could not receive satellite signals, but could see our signals with their naked eyes! I cannot guarantee how accurate this command can be done, but it is better than waiting to die on the spot!"

Claudia subconsciously held John's arm, her eyes drifting, and said with some concern, "But but! It also means one thing that our commander can see, the empire can also see, and our command will be fully exposed!"

"This is not a problem! Our commander is more familiar with the area number of the sea-loving war zone than the empire! Mobilization is faster! Even if the opponent is equally fast, it is impossible to have a head-on battle. The guards of the motherland are tanks designed to deal with ferocious beasts, and the front armor is weak. If they are on the stance to fight positions, let alone the king-level main battle tanks or the giant gods' main battle tanks, even ordinary self-propelled cannons can easily destroy the guards of the motherland!"

Looking at John with a hot eyes, Claudia stopped asking any questions. She only said four words to this childhood friend who had been protecting her since childhood, "I believe in you."

"Thank you for your trust." John hugged Claudia tightly and said, "Time doesn't wait for anyone. You can go to the warehouse immediately, find three colors of pigments, and then contact me in private frequency bands. I will call up a real-time combat map in the command room, analyze the current battle situation, and finally tell you what to do!"

Claudia's eyes were not confused at all, full of trust and firmness "I understand!"

Just as Claudia was about to leave, John suddenly grabbed her hand, looked at her eyes affectionately, and said quietly, "This time, promise me not to mess around like the extreme north crisis. I can't do without you, really can't."

Claudia pursed her lips, nodded heavily, and left quickly.

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Chapter completed!