The Rydberg area is a hilly area, with hundreds of small hills between forty or fifty meters to two or three hundred meters high. However, among the low hills stands a 1,200-meter-high mountain called Rydberg, whose origin has been tried by geographers for many years, but there is no reasonable explanation. The Rydberg region is a typical karst landform with a stable crust and no large-scale orogeny for nearly 30 million years, let alone volcanic activity, with no signs within a radius of more than 1,000 kilometres. But it was in such a place that a mountain dominated by granite and basalt appeared, and if it had been a volcano, then at least the crater that had collapsed or not collapsed should have been found, but after years of repeated searching, there was still no result.

Towards the end of the year, the subarctic region of the Northern Hemisphere has entered winter. A desolate and lonely atmosphere enveloped the area. The low bushes are dry and poured, and the withered annual weeds are yellowing or even whitish. Only the coniferous forests were still struggling to hold up, but they all looked listless, floppy and tired.

This year's cold wave hit early, and the temperature can drop to minus three or five degrees at night, and the highest during the day is only seven or eight degrees. At seven o'clock in the morning, less than an hour after the sun had risen, the frost of last night had not yet melted, and there was still a thin layer of ice on the edge of the babbling stream. The cold wind from the north is sending bursts of ice crystals, and the silver sky is pregnant with a snow country.

Once part of the Kingdom of Aston, it is the only place in the world that has been protected from the ecology.

At this time, the rising sun was once again obscured by clouds, only this time the clouds were no longer water vapor and ice crystals, but a huge swarm of drones - the pursuit began.

"Blake, you should have expected us to be surrounded. You should thank me for bringing heavy weapons. In the cave, after detecting a swarm of drones, Anna said.

"Don't worry, this cave won't be where we end." Blake said.

"Hopefully. I just need you to remember that we're not brothers and sisters anymore, not since Horton's death. Anna said.

"But......" Blake had mixed feelings, and just as he wanted to say something, Anna was contemplated.

"There is no why. My men will not allow a defeated man to defile their lord! Anna said indignantly. In the assassination of the Arctic Ocean ten years ago, Blake chose to stand by and watch; Since becoming the director general of the G64's Armed Defense Department, Blake has even gone so far as to publish the G64's battle sequence in order to avoid war with Olympus; Six months ago, in the lunar colonial war, when the war situation was unfavorable, people with lofty ideals chose to stay and organize forces to continue to resist secretly, but Blake ran from Earth to Saturn with a group of remnants. She doesn't deny Blake's abilities, but that doesn't mean she tolerates Blake's cowardice and delay.

"Well, now is not the time to talk about this, we all have a common enemy no matter what." Blake quickly adjusts to the situation, and they must let go of their psychological baggage with each other. ”

"Olympus' drone has entered the Rydberg area, sir, what to do?" Andrew received a report from the radar soldier and immediately rushed to Blake's side.

"Opening the hologram, our plan was simple. Olympus's combat forces are divided into four types, ground forces, air forces, space forces, and special forces, and now that we are hiding underground, they are only useful to ground forces and special forces.

Judging from past experience, ground forces tend to launch a frontal attack to contain the enemy's forces, and then special forces sneak into the rear to attack Huanglong. But in the cave, there is no distinction between the front line and the rear, and if their special forces want to join the battle, they must first find out the structure of the cave. And the detection of structures relies on seismographs, so as long as we can interfere with their seismographs, their special forces will not dare to enter the cave rashly.

Andrew, you immediately assemble twenty tactical teams, let them go into the depths of the cave and plant explosives randomly, the explosives should be placed in the crevices of the rocks, and the quality control of each explosive is about 20 grams, which can create seismic waves similar to the frequency bands used by seismographs, so that it is difficult for Olympus to analyze the exact structure of the cave through seismographs.

Armed with a large number of drones, tanks, anti-aircraft missiles, laser arrays and transport ships, the Olympusian ground forces tend to launch an attack with drones in the head, armored units in follow-up, and finally commandos in charge of cleanup. In the case of absolute air supremacy, UAVs and armored forces tend to maintain a distance of 50 to 60 km, so we have enough time to deal with their UAV swarms before the armored forces arrive.

Wayne, you take a squad of drones and are responsible for dealing with their swarm of drones. This time, the drone swarm has about 4,000 drones, and it uses swarm tactics. Their thinking is that one hornet is not enough to fight a lion, but a thousand hornets are enough to sting an elephant to death. The idea is good, but there are loopholes. Don't forget, the sound waves emitted by a dozen dolphins are enough to trap a million sardines. Divide our UAVs into 16 groups of 25 each, of which 19 are in a wedge queue for attacking, and six in a U-shape are responsible for electromagnetic interference. Each group of UAVs must move clockwise or counterclockwise at high speed in a vertical plane, and the spatial relationship between groups must be highly disordered. In this way, it is not a problem for our drones to be one against ten.

Anna, your troops are responsible for dealing with armored clusters. The heavy weapons you bring with you can come in handy, and as soon as the armored forces enter the Rydberg area, you immediately concentrate all your firepower on bombarding the outer caverns from underground, with the aim of causing the surface to collapse. Encroached by underground rivers for many years, the surface of the Rydberg area resembles a tissue paper shell, with hills and trees above the paper shell and intricate karst caves and dark rivers below the paper shell. The tanks of the Olympus have great off-road capabilities, but they are absolutely not able to cope with large-scale surface collapse under karst landscapes.

At the same time, you need to send a team to walk 16 kilometers south along this cave, then plant explosives there, and get my instructions to detonate them......"

"Why?" Anna asked suddenly.

"That will be our last retreat, we just need to hold on for 90 minutes, and after 90 minutes, everyone will retreat south - do you understand?" Blake asked.

"Got it!" Wayne and Andrew answered.

"After hiding for so long, it's time for a hard fight. Finally, all the members of the Wehrmacht come with me, and the time for revenge has come! With a wave of his hand, Blake departed with him, disappearing into the dark cavern.

Another fierce battle is coming.