The fourth estate, which forms the sixth estate, will automatically be promoted to the fifth estate after its formation, because the fifth estate is naturally linked to the sixth estate, and it affects the whole body, which is a powerful advantage that the fourth estate cannot match.

Although the Zerg are still classified as the fourth layer, their territory has reached the sixth level, all because they are too special.

It is difficult for the countries and forces in the normal gate world to control such a huge scope, and their administrative capacity cannot meet the requirements, which will inevitably lead to splitting, so there will be such a division as the fifth and sixth strata.

But the Zerg don't split, so they won't have any problems at all because of the large territory.

But although a single sixth layer of the Zerg can deal with it, the plural sixth layer is difficult to parry, the enemy's resources are much higher than the Zerg, and the number is too much higher than the Zerg, in terms of using the spiritual domain, the other party is more in-depth than the Zerg, and knows how to use stratagems better.

For example, deliberately luring the Zerg biota into the spiritual realm, using the characteristics of the spiritual domain to destroy the Zerg biota, or misleading the Zerg biota, luring them to the spirit venerable who specializes in destruction, and so on.

However, the Zerg are not without their own advantages, they reproduce quickly, which allows their combat strength to always remain on a basic line, which adds a lot of difficulty to the advancement of the two Sixth Tier coalition forces.

In order to gain more power against the two Sixth Estate coalition forces, the Zerg began to develop the genes of super-large organisms.

The Zerg have always faced a problem, and that is that the larger the creature, the slower the reproduction.

The root cause lies in genes, the longer the gene chain of a cell, the longer the process of unwinding, transcription, and division of the cell will inevitably be, and the growth rate will slow down at the macro scale.

The larger the organism, the more complex the structure itself, which also means that the longer the gene chain will be.

Therefore, the larger the creature, the slower the growth rate, and the time it takes for a super-large creature like the one conceived by the Zerg to grow into a complete body is probably enough for the enemy to wipe out the Zerg many times.

This is the limitation of genes, the Zerg have studied genes for so long, and finally came into contact with this edge, but they don't know how to solve it, what else do they have besides genes? It can only be the spiritual realm.

Through sacrifice, they get a solution to the problem from the Spirit Venerable, super-large organisms do not have to directly reproduce whole creatures, they can treat all the tissues and organs of super-large creatures as independent organisms, and the Zerg reproduce these biological tissues, and then combine these biological tissues to get the super-large creatures they conceive.

According to this line of thinking, the Zerg's super-large creatures were successfully bred in a short period of time, and were named 'Leviathan' by the Zerg.

Leviathan had a strong fighting force, and was sent to the front by the Juggernaut at an important strategic node, containing the attack of the two Sixth Estate coalition forces, and began to enter a stalemate.

Because of the relationship between Leviathan, a super-large creature, the combat power of the two sides has entered a flat situation, but the situation of the Zerg is special, because the two sixth-level warriors are a little less, but the Zerg can make up as much as they die, strictly speaking, the Zerg has seized the advantage of war.

The stalemate lasted for hundreds of years, and the two Sixth Estates finally showed a little bit of exhaustion, and the Zerg began to slowly push back, and those territories captured by the coalition forces were gradually recovered by the Zerg.

However, the coalition has long been prepared, and the biomass that the Zerg can obtain is very small, and the regained planet is a barren ruin, not to mention animals, not even plants.

And it didn't take long to attack some of the two Sixth Estates before the Zerg had to stop expanding.

A total of more than sixty Sixth Estates that have not yet fought have sent warnings to the Zerg that if they do not stop their expansion immediately, they will jointly attack the Zerg.

Needless to say, this is a force that the Zerg can't compete with, and even a thousand times more Leviathans are not enough to fight against it.

The reaction of these Sixth Estates is the result of the diplomacy of the two Sixth Estates that were at war with the Zerg during the war, and they also had a share of the Zerg's credit for their frenzied devouring of all organic matter, successfully making the other Sixth Estates who were not at war with them see it as a serious threat.

After all, after being defeated by other countries and forces, at least the race can be left, and such things as the extinction of the dead race rarely occur, because nothing can be gained by doing this, and the Zerg that devours all biomass is like an outlier in the door world.

The Sixth Estate, which sent a warning to the Zerg, asked the Zerg to make an agreement with them, and with the Supreme as a guarantee, they would never continue to expand in the Gate World, and on the contrary, they would never attack the territory controlled by the Zerg.

If the Zerg refuse, then they will consider providing material assistance to the two Sixth Estates that are at war with the Zerg.

The Zerg have no choice, their bloodthirstiness can only stand aside in the face of the survival of the race, besides, this agreement is not unacceptable, as long as the strength of the entire Zerg is developed to the level of the seventh order supreme after it is signed, the so-called agreement can no longer be observed.

The Zerg, whose strength has reached the sixth level, has no doubts at all about whether they can enter the seventh layer, and the Zerg at this time still knows nothing about the seventh layer.

They know that the Seventh Estate is stronger than the Sixth, but they don't know to what extent.

On the one hand, it is due to the fact that things related to the seventh estate are very rare, and many of them are regarded as myths and legends, and on the other hand, the Zerg eat people when they see them, and as a result, the Zerg have no concept of the seventh estate.

The Zerg are constantly hoarding numbers, especially the Leviathan, whose strength has been tested by war.

By finding out the number of the Sixth Tier in the Gate World from the two nearby Sixth Strands who had already relaxed their vigilance, and using such a number of Sixth Strands as imaginary military enemies, the Zerg continued to accumulate military strength.

When they continue to the point where they are strong enough to crush the combined military forces of the entire Sixth Estate, that is when they violate the agreement.

As for the seventh estate as a guarantor? Could it be that they could still defeat the combined forces of all the Sixth Estates in the entire Gate World?

Because of the relationship between the Never Expand Agreement, although the Zerg are bloodthirsty and brutal, the Sixth Tier is much more relaxed about them, which provides the Zerg with a lot of convenience in obtaining information.

The Zerg mainly obtains the actual military power of each Sixth Estate, and they are very careful in this regard, after all, this is directly related to the survival of the race, and after violating the agreement once, if they lose, the Sixth Tier in the Gate World will not be stupid enough to make a new agreement with them.

So caution must be exercised.

After slowly continuing to be powerful for a long time, after confirming that the military power could crush all the sixth layers in the Gate World, after a long period of savings, the Zerg finally launched a new round of war.

The first to bear the brunt of the two adjacent Sixth Estates, the huge number of Zerg biota was like a tide that overwhelmed the two Sixth Estates that were inseparable from them at the beginning, like a flood catharsis, and the other Sixth Estates were also powerless, and one planet after another became the lair of the Zerg.

And then...... Gone are the swarms that have plagued outside the Zerg's territory.