At the border of the Rydberg area, more than 100 all-terrain missile vehicles have been deployed in the criss-crossing underground caves. Nearly 1,000 medium-range missiles are all aimed at the roof of the cave, and their mission is to bombard the surface from the ground and create a collapse.

"Lord, do we really have to listen to that coward's orders?" One of the commanders asked.

"He doesn't have the authority to command us, we're just cooperating." Anna replied.

"Lord, I need to remind you that these people are not credible, and we only fought the G64 five years ago, during the Sixth South American War. It is very dangerous to cooperate with a former enemy. ”

"I'll take care of it."

"I've also heard that you have a special relationship with Blake......"

Before the commander could finish speaking, Anna suddenly turned her head and looked at the commander without saying a word with cold eyes, and the commander was so worried that he didn't dare to continue. After a long time, Anna threw down the sentence: "Do your own thing."

The commander knew Anna's temper and walked away, playfully.

On the ground, the Olympus tank unit had crossed the border of the Rydberg area and was heading towards the underground cavern to the main entrance.

These tanks are called "elephant" tanks because of their size, each tank is as tall as a two-story building, weighs 1,500 tons, has a frontal composite armor thickness of 400 mm, and most of the internal space is used to house a 280 mm electromagnetic cannon and a small fusion reactor, making them land cruisers. The fusion reactor provides the tank with the power to travel at speeds of more than 90 kilometers per hour in almost any terrain, giving it the speed and agility of a light tank, the firepower and protection of a heavy tank, and most importantly, the highly automated control system that allows the tank to be operated by only two people, one of whom is responsible for driving the tank and controlling the machine guns on both sides, and the other is responsible for operating the main gun and the laser array on top of the tank.

200 Elephant tanks were divided into four echelons and drove between the hills, which were the main force of the 4th Armed Guards for the ground offensive. The unstoppable torrent of steel didn't seem to realize that the ground under the tracks was already dangerous, and they must have thought that the drone swarm that arrived earlier had helped them clear all ground obstacles, but they didn't know that the real threat was not on the ground, but underground.

"Ready for launch, everyone stay away from the missile vehicle." Anna ordered.

The rumbling sound of the "Elephant" tank resounded in the ears, and even if you were hiding dozens of meters underground, you could clearly feel the tremor caused by the operation of the engine. Rubble continued to fall overhead, cracks appeared in the roof of some caves closer to the ground, and more than 60 tanks of the Fourth Armed Guard had entered the trap area. Everything was going the way Black had expected, but to everyone's surprise, the tanks were far closer than they had imagined, and the trap area was set to accommodate a maximum of 80 tanks. To make matters worse, these tanks were still able to walk on the ground in the hilly terrain, and many of them were even traveling at speeds of more than 100 kilometers per hour, so that before enough tanks could drive into the trap area, the vanguard was already close to the main entrance to the cave at the bottom of the sinkhole.

Can't wait any longer, fire must be fired immediately!

The launch command was heard, and hundreds of missiles rushed to the top of the cave one after another, and the bright tail flame made the entire underground cave in the area become a city that never sleeps at that moment.

With a deafening explosion, the roof of the cave began to collapse. The shattered marble fell like hailstones, and then one after another of the size of a truck, or even the size of a building, began to fall. The missile truck, which had just been spewing fireworks, was smashed into scrap metal in the blink of an eye, and the missiles that had been activated but had not had time to be launched exploded in bundles, triggering a second round of larger-scale collapse.

For the first few seconds, there was no trace on the ground, but soon, strong transverse and longitudinal waves appeared almost simultaneously, almost overturning the tank. Before the Olympus soldiers could react, the surface began to collapse in a large area, and bottomless holes appeared in the blink of an eye on the originally undulating surface, and in the screams of the soldiers, the tanks had no time to avoid and fell into it. If you are lucky, the crew will be stunned, and if you are unlucky, you will be scrapped. The follow-up tanks hurriedly stopped, and the tankers looked at the devastated surface in front of them, at a loss.

Within half a minute, more than 30 "Elephant" tanks were scrapped, and more than 20 fell to the bottom of the cave and suffered varying degrees of damage. Only then did the soldiers react, and they had been tricked. The rest of the tanks hurriedly opened fire, 280 mm caliber electromagnetic guns, one shot can flatten half of the football field, raining shells will have been scorched by the drone swarm ground again, after this bombardment, the entire Rydberg area within two meters of the upper surface, there is no living thing.

However, such a bombing seemed ferocious and abnormal, but in fact it failed to hurt Anna and the others. What's more, the first two rounds of collapse have already shaken the surface geological structure of the entire Rydberg area, and this level of bombardment will inevitably cause another large-scale collapse.

"Quick! Speed up! "Anna commanded the troops to evacuate to the south, this place should not stay for long, once the third large-scale collapse occurs, whether on the ground or underground, there will be no survivors.

Within a few minutes, Olympus also realized this, because the squeak of the marble breaking even drowned out the roar of the engine, and the 4th Armed Guards hurriedly organized a retreat, but unfortunately it was too late.

Mountains are visibly deformed and collapsed with the naked eye, sinkholes with a diameter of tens to hundreds of meters appear one after another, cracks with a drop of 50 or 60 meters hit the entire area like lightning, and underground rivers that have not seen the light of day for hundreds of thousands of years are exposed to the blue sky, and a landslide and ground crack. Thanks to this wave of shelling by the 4th Armed Guards, the originally planned trap area was greatly expanded, and the collapsed surface area was greatly expanded. Crackling sounds, breaking sounds, can be heard even from dozens of kilometers away.

……

After three hours, the surface finally stabilized, and after counting, the 4th Armed Guards lost a full 82 "Elephant" tanks, while Anna's troops, except for more than 100 missile vehicles, did not lose a single person.