After lunch, the wife and the fireflies, who had rested for a while, quickly left the G5-01 supply ship and went to the surrounding waters for daily training. It's just that, because of Zuo Tianyou's explanation at lunch, this time they deliberately chose a place not too far from the supply fleet for their training.

Zuo Tianyou, who put the plates in the tray pool, ran to the deck with a folding chair and parasol, and while enjoying the sunbathing, he thought about who to summon next time.

"Before the next summon, I guess I won't be able to figure out the principle of transformation, that is, I can only summon a battle column or a battle cruiser. But there are so many battle columns and battle cruisers in N, R, and C, and it is estimated that there are forty or fifty of them, so it's a big question who should be summoned. ”

"First of all, don't think about it, in the entire 7,000-year history of the blue world, the six-star qualified ship girl can be counted on two hands. Therefore, the consequences of summoning a six-star ship mother are no different from summoning Gaga, and may even be worse. Five-star, it's still a bit too high-profile, it's best to be a four-star ship, so it won't be so conspicuous. ”

"The four-star battle column and battle cruiser mother, before the transformation, it was nothing more than the Luo Que sisters and the Fushan sisters. So who to choose, from the perspective of potential, the Rona sisters should be upgraded to five stars after the transformation, which is a good choice. However, judging from the amount of food (resource consumption), these two are undoubtedly the big stomach kings, although all the battle columns and battle patrols are big stomach kings. ”

"Also, the speed of the Rhône sisters is an issue. The guerrilla zone has very high requirements for the speed of the ship, and if you bring the low-speed shipwive into the guerrilla zone, then when the fleet is discovered by the deep sea, it will be difficult to get rid of the pursuit in the face of a steady stream of deep-sea habitat ships in all directions. Hey, I'm worried, who should I choose? ”

In this way, in the midst of troubles, Zuo Tianyou spent an afternoon.

Two days later, at one o'clock on July 20, 7754, the supply fleet moved from safety into the front line. Because of this, the wife and the fireflies, who had finished lunch, rarely did not run to train, but stayed on the G5-01 supply ship, and were fully alerted.

It needs to be explained here that the Azure World, which is an alien world, is not a planet, and even the shape of the world is not round - the Azure is a cuboid world that is 50,000 kilometers long, 8,000 kilometers wide, and I don't know how many kilometers high and deep. In addition, as mentioned earlier, the blue world is a sea world, and 90% of the surface is covered by the ocean.

And now, this world with many seas and few lands has two major forces, one is the deep-sea habitat ship that suddenly appeared and hates human beings extremely much and wants to exterminate human beings, and the other major force is the human race as an aborigine, and the ship girl who also suddenly appeared, jointly formed the Governor's Palace.

Of these, the Doge's Palace occupies three-tenths of the world, and the deep-sea side occupies seven-tenths of the world. In other words, if the length of the world of 50,000 kilometers is divided into ten parts, then 15,000 kilometers from east to west is the area under the rule of the Governor's Palace, and 35,000 kilometers from west to east is the territory of deep-sea habitat ships.

According to the research division of the human side, the deep-sea side and the human side are divided into three areas (zones), namely the guerrilla zone, the deep-sea control zone, the deep-sea base camp, and the front-line zone, the security zone and the human rear.

As a geography introduction book approved by the Governor's Palace, [Blue Geography] can be said to be the most authoritative geography on the human side

In this book, the easternmost 10,000 kilometers of the deep-sea territory is called a guerrilla zone or guerrilla zone.

Every month, there are countless free admirals who fight alone or in groups of three or five, as well as groups of admirals directly under the governor's palace, leading their ships to rush into this area, and relying on guerrilla tactics, while resisting the encirclement and suppression of the deep sea side, while eliminating the living forces of the deep sea side, by the way, plundering the materials of the deep sea side, destroying the facilities of the deep sea side, and collecting intelligence on the deep sea side.

The 20,000-kilometer deep-sea territory behind the guerrilla zone is a deep-sea control zone that is run like a wall by the deep-sea side. There are tens of thousands of deep-sea habitat ships gathered here, including many powerful deep-sea habitat ships of seven or eight stars, even if a seven-star admiral enters here, he has to take a big risk. For thousands of years, dozens of seven-star admirals have fallen here, and even the only dozen eight-star admirals in human history have been immortalized here.

Behind the deep-sea control area is the base camp of the deep-sea side, the strongest combat force on the side of the Governor's Palace-Zhan Lan, and there is no guarantee that he can escape with his whole body when he enters. There is little useful information on the human side, let alone research.

Corresponding to the deep-sea side, the westernmost 5,000-kilometer territory of the human side is the frontline zone that is always in the shadow of the deep-sea bombers.

Before the [deep-sea air attack], due to a large number of deep-sea enemy planes flying over the whirlpool sea area, bypassing the frontline fortresses, and attacking this huge area of 25 million square kilometers, the human side had to bear hundreds of thousands of casualties every year.

After the Great Deep-Sea Air Raid, the first half of the frontline zone has almost become a no-man's land, and except for a few areas, most of the islands in the first half are no longer inhabited by ordinary residents. Those who will stay in the first half will either be soldiers, prisoners, or absconding criminals, in short, ordinary people will hardly stay in the front line.

The 5,000-kilometer territory behind the frontline zone is a safe zone on the human side, and since it is already outside the range of enemy aircraft, it is absolutely safe unless the frontline fortress is lost, hence the name of the safe zone. On the whole, it is the most populous and prosperous area of all human territories. At the beginning, Zuo Tianyou was found on an island here, sent to the hospital, and tested to have the qualifications of a commander.

The 5,000-kilometer territory behind the security zone is the rear of the human race, including the Governor's Palace on the Azure Island, where most of the important facilities on the human side are located. As long as this place is still in the hands of the human side, even if the deep sea really fights, the human side is not without the ability to resist. It can be said that this is the foundation of humanity.

And between the territories of the two major forces, the whirlpool sea area, which can easily engulf millions of ships (deep sea), is separated, and the calm sea area between the whirlpool sea area is built from G1 to G11, a total of eleven front-line fortresses.

It is precisely because of these eleven frontline fortresses that they resist the attack of the deep-sea side to the death and protect the human world from the invasion of the deep-sea that the human world outside the frontline zone is so peaceful and peaceful.