Clara did not die, at least not in the cataclysm caused by geological change.

Before Zhang Xiaogang arrives at the valley home, Natasha finds the sisters Clara and Anna and tries to take them away, but the disaster comes too suddenly, and only Natasha and Clara escape. Prior to this, Clara had always believed that Chu Tianjiang would return in a hundred years, so she went into hibernation after leaving her son, and the four Anna sisters took turns to take care of the children. Although Chu Tianjiang did not come back, Clara kept insisting. For most of the two hundred years before the geological catastrophe, she hibernated, waking up for less than five years in total. It can be said that Clara is the most determined, and she always firmly believes that Chu Tianjiang will return to her side.

Because of Natasha, Clara survived the turmoil that followed the geological catastrophe.

Clara did not contact Zhang Xiaogang and them, nor did she go to the underground city, but stayed on the surface and, with the assistance of Natasha, established a settlement. Because Natasha is an all-round X-warrior with strong superpowers, one of which even Melanie doesn't know, that is, she can evolve herself according to changes in the environment, so in the post-disaster era, Natasha became Clara's main assistant.

With such assistants, the settlement established by Clara grew.

Before the arrival of the "Angel Regiment", it was already the largest settlement in the Old World, with nearly a million inhabitants and a good order.

What's more, it's not just settlements.

Natasha found some surviving X-warriors, as well as many mutants who had gained superpowers, and formed an armed force to protect settlements, expand living space, maintain order, and more. On this basis, contacts were also established with other settlements on the Old Continent.

It's just that these aren't the most important things Natasha does.

Through self-evolution, Natasha has almost permanent youth, and through the scientists she saved, she transplanted this superpower to Clara, so that Clara no longer needs to resist time through hibernation, and Clara has more time to manage and run the settlement. It was in this way that, for more than two hundred years, Clara and Natasha managed settlements and established a state on the Old World.

Although this is not a state in the modern sense, mainly Clara and Natasha can only control their own cities, and other cities are controlled in the form of allegiance, but thanks to the efforts of the two, order is being restored to the Old World, and more and more people are getting a safe living environment.

Most importantly, science and technology have developed, and human civilization has begun to revivenation.

Before the arrival of the "Angels", there were already hundreds of cities in the Old World, with nearly 30 million urban residents, and about the same number of people living in towns and villages. Under the encirclement and suppression of the "superpower" legion, the mutants on the Old World are rapidly decreasing.

It's a pity that the arrival of the "Angel Group" changed everything.

In that brutal war, humanity was completely defeated. Clara and Natasha have to abandon the city and flee to the outskirts with the surviving superpowered warriors, using the advanced skills they have mastered to open up a more stealthy living space and fight the invading enemy.

In fact, compared to the "Angel Regiment", the superpower legion is not worth mentioning at all, and even Natasha, who is more powerful than before, is powerless.

Two extremely crucial events changed the fate of Clara and Natasha.

The first is the sudden appearance of the underground civilization led by Zhang Xiaogang, so that the "Angel Group" has to concentrate on dealing with this human civilization that has mastered more advanced science and technology, and has even made breakthroughs in the field of space technology, and has not continued to be fugitives like Clara and Natasha. Taking advantage of the half year that Zhang Xiaogang and the others had earned, Clara and Natasha built the first underground base in the hinterland of the Old World.

The second is a technique. This technique can disguise superpowered warriors so that they become like ordinary people in the eyes of the invaders, or the intruders cannot identify the superpowers they have, so they can blend in with the crowd and evade the pursuit and encirclement of the enemy. Although the first underground base was destroyed a year later, Clara and Natasha, along with a handful of resistants, survived with the use of this technique.

In the long years that followed, Clara and Natasha continued to operate in secret.

After the collapse of underground human civilization, the invaders did not immediately set about forming a state, government and other coercive institutions, but influenced and controlled human beings through the church. To put it bluntly, the invaders do not care about the internal contradictions of human society, they only care about whether human beings will master advanced technology again. As a result, the Old World was mired in a long period of war, with states and governments changing, and the only constant was the Church.

This chaotic situation lasted for about a thousand years.

In the past thousand years, hundreds of countries have emerged, and several powerful empires have emerged, but as long as any country dares to question or rebel against the spiritual rule of the Church, it will be eradicated by the "Angel Regiment" overnight, and then cause more serious wars and chaos.

The prolonged war has led to a sharp decline in the population.

By the end of the war, the population of the Old World was less than 10 million. A large number of cities have been abandoned, and the survivors are concentrated in a few major cities, which are far apart. As a result, the cities were almost completely cut off from each other.

Human civilization thus entered a dark age.

This is an era that cannot be looked back, but it is also an era of fracture.

Prior to this, there were still many people who knew the history before the disaster, and the brilliant achievements of human civilization, and these people have been inheriting human civilization in various ways, telling history to future generations, and leaving future generations with goals and ideals to strive for.

But in this era, human civilization is completely broken.

In the Dark Ages, all living people had only one purpose: to live at all costs.

While fundamentally the roots of the Dark Ages were in the invaders, this age was not directly related to the invaders or the churches they fostered. The Dark Ages were triggered by a millennium of wars and the depopulation caused by the wars.

When the Dark Ages came, the population of the Old World, which covered an area of more than 20 million square kilometers, was less than 10 million!

What is this concept?

Even if we exclude the extremely cold regions in the Arctic Circle, as well as the deserts and deserts in the lower latitudes, the population density of the approximately 10 million square kilometers of land that can be used for human survival is less than one person per square kilometer. Before the advent of the era of catastrophe, there were close to 10 billion people on the Eurasian continent!

The sharp decline in population has directly led to a decrease in social productivity.

In order to survive, in order to deal with all kinds of mutants, people have to give up some things, such as science and technology that will not be effective in the short term.

For the first 500 years, the life of the survivors was extremely difficult, and humanity was once pushed to the brink of extinction.

At its most dangerous, only one city was left unbreached by mutants, and the number of surviving humans was reduced to less than a million.

It's just that the Dark Ages also created opportunities for Clara and Natasha.

Outside of the city, Clara and Natasha have teamed up with super-powered fighters who can fight mutants to establish a new base and change their approach, building the base underground from the beginning in order to avoid mutants who are mostly nocturnal. In addition, a lot of scientists were also found, and they managed to find some scientific research equipment, which reopened the era of science.

Thanks to the efforts of Clara and Natasha, human civilization has held its strongest fortress and gradually recovered.

Interestingly, during this period, the invaders did not deal with the Resistance controlled by Clara and Natasha, and even secretly helped the Resistance against the mutants. It was only after the Resistance held its ground that the Church made a comeback, took control of the city, and usurped the Resistance's credit.

Unlike before, Clara chose to retreat very sensibly.

With the survival of humanity ensured, Clara and the resistance group controlled by Natasha left the city, left the civilians they had previously protected, and disappeared from people's sight, never interfering with the normal development of society again, and even had little contact with the outside world. It's just that the resistance has been active, hiding among the common people, gaining resources and recruiting new members.

This method has won the survival space of the resistance groups.

The Dark Ages lasted for about two thousand years, and it was not until about the third millennium of the Sacred Calendar that the population of the Old World recovered to about 100 million.

During this time, the Resistance had been operating underground, building fifteen underground cities on the Old Continent.

Unlike the underground cities established by Zhang Xiaogang and others, the underground cities of the resistance groups are within the earth's crust, and they are often under a certain town, using the town as a cover.

What's more, the Resistance did not touch the intruder's bottom line, which was the space technique.

For the next few thousand years, Clara and Natasha took turns ruling the Resistance, investing a lot of resources in other scientific fields besides space technology, and even developed the technology to produce energy bodies, but it was very immature, that is, the energy consumed to create energy bodies was more than the energy contained in energy bodies. As for human civilization, it has always been in a state of ignorance because it is controlled by the Church. After thousands of years of elimination, science and technology have become history, and human civilization has regressed by thousands of years, even tens of thousands of years. Although almost everything has been lost and opportunities have been lost, human civilization still exists, and there is no extinction, and there is no loss of hope.

Clara and Natasha did not resist, they were waiting for Chu Tianjiang to return, waiting for the opportunity to defeat the invaders in one fell swoop.