The planning of the Sagittarius spiral arm defense area has been basically completed.

The Mechanical Empire is responsible for the part of α1 to 99, the Three-Eye Civilization is responsible for the part of α100 to 199, and the Photosynthesis Civilization is responsible for the part of α200 to 300.

Humans are responsible for the star systems after α300.

However, the main defense area of ​​the spiral arm is the star field in front of α300, and the sequence number goes backwards, the importance decreases in turn.

In fact, the part of α200 to 300 that photosynthetic civilization is responsible for is relatively simple.

Therefore, the spiral arm defense task behind the star field behind α300 is relatively easy.

In the eyes of the Three-eyed civilization, humans are completely unnecessary for the star domain behind α300.

Therefore, in the Sagittarius spiral arm defense zone planning, the content of the planning text is only α1 to 300. After α300, it is only an optional supplement.

Humans do not belong to the carbon-based alliance, and are temporarily united against the Palesey Galactic Far Star Empire, so they jointly defend Sagittarius spiral arms.

Inside the α369 star system of Sagittarius.

The Shenzhou is doing daily patrols.

Usually, patrol work is carried out by the counterattack number.

Today, the military research class is responsible for this work and cleans up the possible enemy observers in this defense area.

In this regard, the Shenzhou detection equipment has stronger power and a larger detection range.

...

While humans are deploying defenses in the Sagittarius α300+ star domain, they will also help photosynthetic civilizations to coordinate defenses.

The defense zone of photosynthetic civilization is α200 to 300, which is adjacent to the human defense zone, so coordinated defense can be carried out between each other.

Of course, the photosynthetic civilization is also working together to defend with the Three-eyed Clan fleet.

For photosynthetic civilization, the safest choice is to surround yourself with many bodyguards.

Over time.

The combined fleet of Kaztic and Duke Yaton has completed the construction of the defense zone of three spiral arms of the Shield, Perseus and Rudder.

These three spiral arms were originally under the control of the Palesey Galaxy Far Star Empire, so it was relatively simple to build a defense zone.

The most important thing in the defense zone is its reconnaissance function, followed by its blocking effect in cooperation with the fleet.

General Kaztic, sent by Palesey's parent star, has experienced many main battlefield battles.

Therefore, his playing style is completely different from the previous three nobles of Palesey.

The nobles such as Duke Yadon prefer to command fleets to expedition, and use an absolute advantage to penetrate the local territory and capital.

However, Kaztic is different. He is better at the battle mode of the main battlefield, advancing the defense zone, constantly expanding the control area, squeezing the activity space of hostile civilizations, and finally suppressing the hostile civilization in a very small star field and annihilated it in one fell swoop.

The most prominent feature of this battle model is stability, and it will advance step by step, without giving the opponent any chance to turn the tables.

The most important thing in fighting this kind of star-domain promotion battle is defense area reconnaissance and enemy defense area infiltration.

Therefore, after Kaztic arrived at the Milky Way, he did not command the fleet to attack the Sagittarius spiral arms at the first time. Instead, he controlled the resource star step by step, built a reconnaissance ship factory, and began to produce reconnaissance ships and unmanned reconnaissance aircraft on a large scale.

The way of playing the star domain advance requires absolute control of the star domain.

The control of the star domain is reflected in the reconnaissance power within the star domain defense area.

This is also the first thing Kaztic did after arriving in the Milky Way, to improve the reconnaissance of the spiral arm defense zone, and to be able to count the location and degree of each meteorite.

As long as any object enters the defense area and does not meet the trajectory of the meteorite and dust running that do not comply with the judgment of the defense area reconnaissance system, an alarm will be immediately issued.

Therefore, under the control of Kaztic, all the star fields in the defense zone were completely included in the surveillance, and no speck of dust could escape his reconnaissance.

To do this, a huge number of reconnaissance stations, reconnaissance ships and unmanned reconnaissance aircraft are required.

Moreover, as the star-domain defense zone moves forward, the number of reconnaissance stations and reconnaissance ships required will increase exponentially.

Therefore, the battle that Kaztic fought is a slow-paced battle, constantly expanding the defense zone and not giving hostile civilizations any chance.

...

The Carbon-based Alliance is doing the same thing, improving the reconnaissance in the defense zone as much as possible.

However, on the side of the Palesey Galactic Far Star Empire, there is a general on the main battlefield of the Holy Temple sent by Palesey's mother star, who is good at promoting battles in this kind of star field.

There is naturally a reason why the commander of the three civilized Galaxy Fleets will be sent to the Milky Way.

The fleet commanders of the three civilizations do not have the experience of commanding the battle commanders on the main battlefield, so their experience comes from information and reading.

Therefore, they did not seem so skillful when they learned this set of star domain promotion campaign mode.

In fact.

Human beings are also learning this strategic model.

However, the level foundation of human civilization is relatively low, and it is very difficult to open a reconnaissance station and reconnaissance ship.

Therefore, you can only try on a small scale, which is to accumulate experience for the battle.

...

"Kaztik's defense zone has expanded to α112 of the Shield. If you continue like this, you will probably have to cross the spiral arm and start invading the spiral arm of the Sagittarius." Lang Xiaonian studies the star map every day.

Wherever the defense zone of the Galactic Far Star Empire has been pushed, he will update every day, and he will worry more every day than the previous day.

Because Kaztic is too good at this set of star map promotion tactics, the Carbon-based Alliance is always half a beat slow and is led by the nose, which is very passive.

Kaztic has advanced to the shield α112 and is about to invade the Sagittarius spiral arm.

The Carbon-based Alliance hurriedly deployed defense in Sagittarius α132 to prevent Palesey's reconnaissance forces from invading.

However, the pressure of Shield α112 has not yet passed, and the expansion of Perseus α72's defense zone on the other side also began to threaten the bordering star field on the Sagittarius side.

For a time, the Carbon-based Alliance felt like it was attacked from both sides and was unable to resist.

Judging from the situation, Kaztic can obviously launch an attack at any time and ignite this battle.

However, the fleets of Kaztic and Duke Yadon were not moving for a long time, and were still expanding the defense zone step by step and continuously compressing the activity area of ​​the Carbon-based Alliance.

Over time.

The star systems around the core star domain of Sagittarius spiral arm have been included in the control range by the Kaztic fleet.

Carbon-based alliance transport ships, mining ships, and patrol ships will be threatened with attack as long as they enter the control range of the Kaztic fleet.

The Carbon-based Alliance wants to fight back and send warships to support it immediately, but it will encounter greater danger every time.

Once the number of warships sent is large enough to suppress the local forces of the Kaztic fleet, the warships of the Kaztic fleet will temporarily evacuate.

The Carbon-based Alliance's attacks are always a waste of effort and even fall into a trap.

The ultimate result is that the fleet of the Carbon-based Alliance is in danger all the time outside its own defense zone, just like a blind man.
Chapter completed!