It was just the second year after the First Legion began the program of visiting the Loulan Star Domain.

In the presidential palace of the Earth Federation, a top-secret plan is underway, which Lin Zhen named the Great Wall of Stars Project.

The plan is to build an interstellar wall to eliminate the potential threat of the Babawi Empire to the Federation, to ensure the stability of the Federation for the next fifty years, and to lay a solid foundation for the future capture of the entire Orion Arm.

Everyone knows that strategic depth is meaningless for a Level 4 civilization, after all, the Jump Engine is really a bit cheating, making it impossible for people to effectively defend against it, which is why the Babawi Empire has made the Jump Engine a ban on the sale of equipment.

Then, after the fourth-level civilization, if you ensure the security of your own territory, it has always been an important topic for the Human Federation, and no effective measures have been studied for more than ten years.

It wasn't until the Alliance joined the Theo Alliance that they saw the [Jump Blocking Technique] and the [Jump Blocking Confrontation Technique].

Since it is only the technology of the early stage of the level 5 civilization, for the level 4 civilization, it can be done after having all the technical information.

Many people may say that even with technical information, it is impossible for a fourth-level civilization to understand the technology of a fifth-level civilization, but in fact this is a false probability.

Let's just say how a fourth-level civilization can become a fifth-level civilization, isn't it necessary to study the iconic technology of the fifth-level civilization before it will be officially promoted to the fifth-level?

If a civilization can't study cross-level technology, then all civilizations don't need to be promoted, not to mention that now humanity still has all the technical data.

The most important thing is that under Lin Fan's cheating, human beings directly came up with a brain domain development potion, and this kind of perverted thing can be said to not even have a fifth-level civilization.

Therefore, after Bai Zixuan's team arrived, the first task that Ed gave to Bai Zixuan was to take his team to understand these two technologies.

It took a whole year, and Bai Zixuan and his team have already achieved good results.

Although the manufactured test equipment does not reach the range of 1 light year in the technical description, it has also reached the range of 0.79 light years, and it is completely ready for mass manufacturing and use.

Initially, Lin Zhen and Ed's plan was to install a jump blocking device in each star system and place a large number of detection devices within a range of 0.79 light-years.

In this case, no matter which star system the opponent wants to attack, it will be affected by the jump blocking device at a distance of 0.79 light years, and thus exit the jump state.

Then there are only three options for invading civilizations!

The first is to spend a few years at sub-light speed to slowly complete the 0.79 light-year journey, and in the process, it will inevitably be detected by the numerous detection equipment laid by the Federation.

The second is to jump to the star system on the side, and then follow the path of the stars like the third-level civilization, provided that the star system on the side is not arranged with a jump blocking device.

The third is to retreat!

This is the chain fortress plan originally drawn up by the two, which directly builds all the star systems in the territory into fortresses, so that the invaders cannot speak.

However, with the expansion of the human realm, and now that there is such a huge Loulan Star Domain, the thoughts of the two have changed and become even more crazy.

As a result, a Great Wall of the Star project that shocked everyone appeared, and anyone who had read the content of this plan was shocked by the generosity of this plan, and even many people directly called Lin Zhen and Ed two crazy people.

Yes, it's crazy.

How crazy is it?

As we all know, the Orion arm is about 20,000 light-years long and much smaller in width and thickness, but it is also a thousand light-years.

And Lin Zhen and Ed plan to use the jump blocking device on this arm to build an interstellar Great Wall with a thickness of ten light years.

According to calculations, if the Human Federation is to complete this project, it will need to build at least 40 million jump blocking devices for networking, and once completed, the Orion arm will be completely cut in half.

From then on, if the Babawi Empire wanted to invade human territory, there were only two ways.

One is to slowly cross these ten light-years with a sub-light engine, which is expected to take at least 30 years!

The other is the honest way of walking the stars, but this will also face the defensive advantage of the human way of the stars, and if you want to break through, you have to pay at least 5,6 times the battle damage of the human race.

Even if the Babawi Empire obtains the [Jump Blocking Confrontation Technique] from the Vera Alliance, it is useless, as I said before, the [Jump Blocking Technique] and the [Jump Blocking Confrontation Technique] are used in pairs.

After all, any civilization using the [Transition Blocking Technology] can set its own blocking frequency, and only by knowing this frequency and setting it in the Transition Blocking Adversarial Device can it jump through normally.

And this blocking frequency is infinite and can be changed at any time, and it is almost impossible to crack it.

And the best thing about this plan is that, according to what humans know about the Orion arm, there is a region in the center that seems to have been cut off, and there are no star systems in the full ten light-years of length.

A year ago, Lin Zhen secretly sent many exploration spacecraft, targeting this starless region.

Not long ago, the news was even more surprising that in that empty stellar region, there was only one star path connecting one of the star systems on either side.

In other words, as long as the human Great Wall plan is completed, then this star path will be the only way for the Babawi Empire to invade human territory, and human beings can ensure the absolute security of the entire territory in the rear as long as they deploy heavy troops here.

At that time, there will be a very interesting situation, human beings can use the jump blocking countermeasure device to cross this Great Wall of Stars at will, and attack all parts of the Babawi Empire at any time, anywhere!

However, the Babawi Empire can only reach the human territory through the only Star Path, and it takes more than three years to reach the human territory, and it also has to face the human heavy army with extreme defensive advantages at the exit of the Star Path.

Now, the entire federation has been in full swing for this Great Wall of Stars project, frantically arranging mass production lines in various star systems, and calculating that within five years, all 40 million sets of jump blocking equipment will be produced.

As for the resources required, Lin Zhen also had a plan for a long time, and the current human reserves and the resources contributed by the affiliated civilizations were enough for the human race to support this construction plan for 2 years.

In another year, the Third Legion of the Federation will be formed, and their first task is to follow in the footsteps of the First Legion into the Loulan Star Domain and clean up all the civilizations that have been assessed by the First Legion as lacking potential.

Spanning a starfield of 500 light-years, the internal resources are not to mention building an interstellar Great Wall, and it is no problem to build a few more, and this is only based on plundering the exploited resources of these civilizations.

As for the untapped resources, there is still a huge surplus in the construction of 100 of them.

Therefore, this is a great purge that affects the entire star field, and it is also a great plunder, which is the main theme of the interstellar era.