In the entire roller world, Lu An's locust tree tribe is not the only one.

In another part of the land of this roller, Yu Ji (the mercenary of time and space) looked at the giant axis in the center of the roller, and the light projected by the artificial light source on the giant axis illuminated the earth. Yu regret raised the white jade spear in his hand, and a large number of human beings around him knelt down religiously, worshipping Yu regret like worshipping a god. Behind the regret, a large flag was erected, and on the flag was a sinuous beast, the beast had two horns, four legs, four legs, and five claws. It's not that Yu regret doesn't want to paint in more detail, but in Yu regret's imagination, it is best to paint the golden scales as well, but the linen cloth can only be dyed like this. (Linen can't support high-pixel patterns)

When the flag was erected, the giant shaft seemed to be sensing the situation on the ground, and a flying machine flew down from the giant shaft, which surprised Yu Cheng very much, and when he was about to activate his talent, Yuan Yi gave an order on the light curtain to keep Yu Cheng quiet.

The flying machine that flew down from the giant shaft did not attack the human holding the stone spear on the ground of the roller, but clicked and flashed a few times.

The pious human beings, who knelt on the ground, buried their heads even deeper, because it seemed to them that the angels flying from the sky had shed holy light on their leader, which was equivalent to the heavens acknowledging what they had propagated.

In the face of everyone's piety, Yu regret grinned at the sky, and showed a bored look at the aircraft in the sky that took pictures of him, and Yu regret hated the taste of being targeted.

However, Yu regret did not dwell on it for long, the hundreds of soldiers kneeling in front of him have been provoked by this vision of heaven and earth, in ancient times, morale is more important than the number of troops, the battle of Guandu, coerced the Son of Heaven to order the princes' Cao army, thinking that they are the Son of Heaven's troops to rebel. Do not collapse under several times the military pressure of Yuan Shao.

The soldiers under the command of Yu regret picked up the shield made of rattan, held the stone spear, and formed an army, and there were even long-range attack units in this army, twenty warriors with slings, the attack power of slings is actually no less than that of bows and arrows, but the problem with slings is that everyone must be very separated when throwing stones, otherwise it is easy to throw other people. Bows and arrows can form a dense queue.

But now, after all, this is not a military battle of tens of thousands of people, but a battle of hundreds of people, and it is very effective to attack the troops with slings.

The expansion began, compared to Lu An's desire to take his time subtly, Yu Xi, Dong Ming, and Yang Jie, the three space-time mercenaries, decided to point all the technology points to the military after meeting, and their rattan shields, stone spears, and stone daggers were imitation of the Roman battle array. After training the soldiers to form a formation, they use their shields to form a shield wall, throw a round of spears, hit the opponent with the shield wall, and then stab people with short blades through the gaps that expose the shields.

This kind of military technology is very advanced at the moment, and it is a tactic of the Greek city-states to dominate the Mediterranean. Of course, this ferocious tactic needs to be paired with another transportation technology, and that is the boat. Only ships can provide mobility for this force. A spear, a shield and a dagger don't look like anything, but in fact the cost is not the same for every ten kilometers of walking with two extra kilograms of goods.

If Yan District does not have such a long river, Yu Xi's military technology is actually the wrong technology tree. And now with a large number of bamboo raft canoes on the river, this tech tree is right.

When these rattan soldiers came to the villages along the river, they would first set up the proposed lever catapult, and then fix a section with hemp rope, put stones on the ridge section and pull the hemp rope, the lever was raised high, and the burning wood would drag the green smoke down to the village

The warriors of the village would then run out and attack the dragon tribe's shield wall in a chaotic formation. As a result, after dropping several corpses, the warriors of the entire tribe were surrounded by a shield wall, dropped their weapons and surrendered in panic.

The surrendered tribes will be looted, the men will be turned into slaves, the women will be turned into property, and the old will be killed. (There are no children in the roller world.) All the dead bodies would be thrown into the wilderness for unknown birds and beasts to eat, and perhaps something that wasn't a living thing would also land.

The Dragons attacked seven villages in six months, capturing six times the population, and became slaves of males, who would become members of the Dragons if they joined the army and fought successfully. Assigned women, food and slaves. After bowing down to the Dragon Banner, they will be considered a member of the Dragon Clan.

Under the leadership of Yu Xi, the entire tribe began to digest the surrounding population at an alarming rate.

The impact of the dragon tribe on this roller land is not only that, a large number of tribes began to flee to the south, and the territory of each tribe is a hunting economy, and the hunting economy depends on the amount of animals in the mountains to reproduce. And if there are apex predators in the mountains, and humans compete for food, the hunting economy is unstable.

Therefore, each tribe cannot accept such a large number of people, and a large number of people are still inescapable.

The camera switches to Lu An, what is happening in the north, Lu An understands, Lu An is able to cruise around in the rehearsal, the reason why he is cautious in reality is that he is afraid of causing harm to this fragile roller world, Lu An does not think that he can survive in a vacuum, through the rehearsal, Lu An knows that the time and space mercenaries like himself have already acted.

Lu An didn't have any anger about what the three space-time mercenaries did, the unification and integration of the tribes would inevitably bring conquest and occupation and killing, and it would inevitably bring a slave economy, Lu An felt that many of his emotions in the state of multi-union were not suitable for doing this, but Lu An would definitely not think that it was wrong for others to do this.

Lu An was surprised by another thing, and that was that the elders of the village were performing a ritual these days, using flames to make a strange symbol on the ground for three days in a row. Lu An, who felt strange, asked the conclusion with a rehearsal, and looked forward to his successor coming to this world again.

Lu An scoffed, but Lu An then used the physical computer to calculate a situation, that is, a bird flew down from the giant shaft above, the old man understood what this bird was doing, looked at the bird with a smile, flew to his side, pecked in the neck, and then the old man died.

This scene was not blocked by Lu An in reality, because if Lu An stopped the bird and shot the bird, the old man would fight with Lu An with red eyes, and the people around him would not stand by his side and watch Lu An destroy the tradition with cold eyes.

However, during the rehearsal, Luan dismantled the bird, which was purely mechanical, with two tubes inside, one to collect blood and the other to inject some kind of liquid. Based on the old man's death and the autopsy in the rehearsal, Lu An determined that he should have died of a neurotoxin like a sea snake.

The people of the tribe were not surprised by this. Lu An asked someone else in the tribe about it, it was a blue bird, a bird that brought the suffering of the earth to heaven. After the command is delivered from heaven, it will be sent back to the world again.

Lu An was stunned for such an explanation, and then recalled what the electromechanical system said to himself before he arrived in this world from the technology warehouse of this spaceship, "Enjoy life." Lu An suddenly understood something.

A few days later, there were people running out of the mountains, dressed in white and light clothes, which were made of the same material as thermal underwear, which could not be woven by tribal-level technology.

Luan also wore such clothes when he arrived in this century, that is, this spaceship, after the death of a person, a new person was dropped again. It's just that the face of this newcomer is very similar to that of the dead old man.

After introducing these ignorant people who only have language memory and some common sense memory of life into the tribe, Lu An questioned the elderly people in the tribe, and then flew to inspect the corpses of the destroyed tribes in the north.

The fact seems to be that the population of this drum ecosphere is constant. As many people die, as many people as they die, no one here can have children, which is why there are no children in this ecosystem.

After guessing this fact, Lu An was puzzled and the other, while directing the newcomers to farm and conduct further experiments on the world,

During the night, Luan found a mechanical bird, and after the bird flew above Luan, Luan used the guide force to press the bird to the ground, buried the camera in the mud, and then threw something into the collected glass bottle.

After a few minutes, Luan walked back to the house and released the bird into the sky.

Lu An did it seven times in seven days, and asked these bionic birds to collect pig's blood, cow's blood, sheep's blood, and fish blood, but none of them found any creatures within a 10-kilometer radius. It seems that the survival pod only sends humans into this drum land. Lu An thought about it and felt that it was right, after the rehearsal and the all-round reconnaissance of the surrounding ten kilometers of land by the guiding computer, Lu An could still see the cubs moving in the mountains. In other words, these naturally reproducing species do not need to be cultivated in a life support chamber.

When Lu An began to make up his mind, out of the habit of everything from beginning to end, he continued to do the eighth experiment, and the tiger roar in the mountains that night made Lu An stunned, and Lu An had to revise his guess: "There are a number of higher predators in this drum spaceship. ”

Lu An immediately formed a hunting party and entered the mountains on the same day. Lu Ann then looked at the tiger that had died in a trap on the mountain. It was skinned again, corresponding to the stripes on the previous tiger skin, and looking at the consistent pattern, Lu An determined that the genes of the two tigers should be the same.

Seeing this scene, Lu An's sixty percent of the second type of rehearsal couldn't help but look up at the huge axis in the sky, feeling frightened by the purpose of the inexplicable forces on the axis.

"Could it be that the purpose of the existence of humans in this capsule is to maintain the ecological balance of the entire capsule together with the higher predators?" Feeling as if he was being raised, Lu An couldn't help but put forward this terrifying conjecture.