The cultivation of lower-level civilizations is proceeding in an orderly manner. Apart from the more than 150 Star System-Level Civilization, all other lower-level civilizations have been incorporated into the Cramming Growth Plan. Hu Yu also has the fleet continuously extracting energy from the fourth dimension to synthesize various elements. The production of these elements has far exceeded the demand for manufacturing the fleet.
These elements are prepared for the current low-level civilizations. If so many civilizations were to use planets to build fleets, the entire galaxy would be in danger. Therefore, Hu Yu prepared various elements in advance, and will transport them to these low-level civilizations when they have mastered the technology and are capable of producing fleets.
The fourth dimension is not only much larger in space, but also much more abundant in energy. Even if millions or trillions of civilizations used it, it would not have any impact on the fourth dimension.
The battles on the defensive line were simple and monotonous, with a swarm attack every few years. The command of the fleet was handed over to the Carina Civilization Carina Civilization, which already had a fleet stationed on the defensive line and was rich in combat experience. The alliance only needed to continuously replenish the fleet to the defensive line, and Hu Yu didn't need to worry about anything else.
However, over the years, Hu Yu has also come to understand why the defense line has always been in dire straits. The defense line is known as the warship crusher. Every once in a while, the swarm of insects will gather enough numbers and then attack the defense line. This situation has never stopped for more than two million years. Perhaps the insects are also afraid of the civilization's fleet gathering a huge number, so they are constantly wearing each other down.
In the year 61,000 AD, a fleet of billions of Exterminator appeared in the fourth dimension near the defensive line. This was the defensive zone of five Great Star Region Civilization. Here, Hu Yu witnessed why the Neutron Star Defense Line could not only function in the three-dimensional universe, but also defend against the fourth dimension.
The powerful gravity of neutron stars not only affects three-dimensional space, but also creates vortices in the fourth dimension. This is because the neutron stars created by the Great Star Region Civilization are all high-speed rotating pulsars. Their high-speed rotation and enormous gravity directly form huge vortices in the fourth dimension, vortices that even the Exterminator dare not easily step into.
Here at the defensive line, Hu Yu saw the giant ships of five Great Star Region Civilization. Strangely, the fleets of the Great Star Region Civilization were not as numerous as he had imagined; in fact, their numbers were relatively small. Compared to some established Small Star Sector Civilization, their fleet numbers were not much greater. Although the space here was more expansive, there should still be more than just these few warships.
However, Hu Yu saw many strange things here. These things were much larger than the fleets of the Great Star Region Civilization, and their shapes were not very regular. They seemed to be hastily made products. They were long, square, round, and flat. Now that there was no war, Hu Yu did not know what use these things were.
The Great Star Region Advanced Civilization didn't react much to the arrival of the human fleet, simply offering a brief greeting. This time, Hu Yu finally got to see the warships of all five Great Star Region Advanced Civilization. In the end, it was the Yun San Civilization and the Heavenly Peak Civilization that took the initiative to greet Hu Yu; otherwise, the Exterminator would have been awkwardly patrolling the area.
" Lord Yun San, Lord Heavenly Peak, may I ask what these strange things are used for?"
"Attack weapons, you've just entered the Great Star Region Civilization stage. Have you noticed many differences between the fourth dimension and the three-dimensional universe?" the Yun San Civilization asked.
"Indeed, apart from the difference in spatial displacement, all our attacks seem to be weakened in the fourth dimension. Scientists in this civilization are currently researching effective attack methods."
"The reduced attack power is normal. Although the spatial constraints are weaker here, the energy is more abundant, so any attack method that utilizes energy will be weakened."
"Yes, we have discovered this phenomenon. Not only are energy attacks weakened in the fourth dimension, but spatial attacks are also weakened."
"That's why we created these strange things. In the fourth dimension, the attack range of our fleet is greatly reduced, and we can only unleash powerful, wide-range attacks by relying on these massive space-based systems. Our warships are already large enough; increasing their size would not only reduce their flexibility but also greatly slow down their construction speed. Therefore, our warships operate around these massive space-based weapons, which is more efficient."
"I see."
"You should also hurry up and build ships. With this fleet and strength, you can lead the Small Star Sector Civilization in battle within the three-dimensional universe for now. You don't have the capability for the fourth dimension yet, so coming here would be pointless. However, you can stay here and get a feel for it; it will be of some help to you. But it's very difficult for Small Star Sector Civilization to enter Great Star Region Civilization. Entering an advanced Large Star Region civilization is ten times more difficult than the initial one. You need to be mentally prepared. Of course, if you're smart enough, it might be possible to achieve this as early as tomorrow."
"Yes."
The Exterminator left 100 million ships here, while the rest returned to the Solar System. Now the Solar System has been completely restored, and everything here is the same as before. All the planets, asteroids, moons, and even meteorite fragments have been restored. The distant Kuiper Belt, which had become empty, has now been restored to its former glory, with various asteroids, comets, and other asteroids filling the Kuiper Belt once again.
The Exterminator fleet is anchored in the Kuiper Belt. There aren't many fleets inside the Solar System. With the increase in population, the number of planets is essential. Of the more than one hundred inhabited planets of mankind, only New Earth is in the Solar System. Even Earth Two and Number Four are placed on Upsilon1 Hydrae. Anyway, now that a long-term and stable four-dimensional channel has been established, and there are fleets protecting these channels in the fourth dimension, the distance between the Solar System and Upsilon1 Hydrae is only the length of a cup of tea.
Academician Zeng is still guiding a group of academicians to research attack methods in the fourth dimension. In essence, spatial attacks are about energy influencing space, causing various changes in space to achieve the attack effect. However, the fourth dimension adds another dimension. Although three-dimensional attack methods are still effective in the fourth dimension, the effect is much worse.
Because four-dimensional space is more stable and has more abundant energy, but the rules here are more relaxed, warships can easily break the speed of light using conventional power engines. Actually, it's not quite right to say that warships here can easily break the speed of 300,000 kilometers per second, because the speed of light here is not 300,000 kilometers per second. Measuring the speed of light here is meaningless, because light will switch arbitrarily between the four dimensions as it travels.
Light is three-dimensional. Whether it is a wave or a particle, its direction of movement is marked by three coordinate data. However, in the fourth dimension, these three coordinate data will constantly switch back and forth between four coordinate data.