The city of the Four Directions has nine military commanders at the level of marshal, who are in charge of all defenses. Among them, the eight marshals are in charge of the four military regions in the southeast, northwest and northwest, and each military region has a defense line of more than 100 kilometers to resist the invasion of the ancient beasts outside the Sifang City. The ninth marshal is in charge of the security of the entire Sifang City.

Under each marshal stationed in the four directions, there are twenty legion-level formations. Among them, one corps is under the direct jurisdiction of the Marshal's Office, one corps is responsible for maintaining military affairs under its command, ten corps is directly responsible for about 50 kilometers of defense under their respective military districts, and two corps are located in the hinterland of the armament zone, responsible for long-range strikes and artillery support.

The remaining six corps are in charge of logistics supply, providing timely material supplies for the twelve corps fighting on the front line, and when necessary, they can completely fill the vacancies of the combat corps and reinforce the combat corps in time.

Of course, Sifang City has such a large number of troops, and naturally it has also formed a sound official system. Under the marshal, from high to low, they are the existence of generals, corps commanders, ten thousand commanders, thousand commanders, centurions and ten commanders.

Among them, the generals are completely under the orders of the Marshal's Office, which can be called the existence of the general staff, and most of the orders of the combat corps are also directly issued by these generals.

In the army, recruits like He Yifei need to continuously accumulate military merits if they want to be successfully promoted. Of course, military merit also has another major benefit, that is, it can be used to exchange for more profound qigong refining methods from Sifang City.

The exchange of military merit for merit is a great temptation for anyone. After all, if a person does not have absolute strength, he will not be able to deter his soldiers who are like tigers and wolves.

However, the reason why Sifang City was able to provide the army with high-level cultivation exercises was also due to its mastery behind the scenes.

In fact, the real ruler behind the scenes of the Four Directions City is the Nine Martial Gods who are famous in the world. They will select a puppet ruler to deal with some disdainful trivial matters for them.

Of course, any resources required by the Nine Great Martial Gods were also collected and provided by Sifang City, which could be said to be the power of the whole clan to serve the Nine Great Martial Gods.

Even if the ruler is just a puppet in the eyes of the Nine Martial Gods, but being able to be elected as a ruler can seek greater benefits for his family, which can be regarded as a benefit acquiesced by the Nine Martial Gods.

Because of this, the powerful families in the Sifang City have all worked hard to cultivate the children of the clan, just to win the position of the ruler.

However, the existence of recruits like He Yifei naturally won't understand these unspoken rules behind the scenes of Sifang City. Their goal was simply to get a high position in the army and thus improve the poor situation of their families.

After learning the system of the army, the instructors in charge of the training of recruits also began to explain the real layout and structure of Sifang City to these recruits. This knowledge can be regarded as the military secrets of Sifang City, and it is not something that teenagers can learn in compulsory education.

As a soldier, he should naturally be familiar with every part of the Sifang City, after all, only in this way can he rush to the designated location as quickly as possible to carry out the tasks assigned by the Sifang City when the disaster comes.

Sifang City, originally just a square city with a city wall of about 20 kilometers, at the beginning, human beings followed behind the two great powers, Tai and Xu, and forcibly hollowed out the four nearby mountains, thus creating this stable base.

However, after more than 2,000 years of human reproduction and development, today's Sifang City has long been different from what it used to be, and it has changed greatly.

Among them, the stone city that was originally built is now clearly divided into two cities: inner and outer.

The inner city, which is under the control of the Sifang City Political Regiment, is at the core of the stone city, and the landmark building in it is a circular white tower nearly 100 meters high. The inner city is an area with a diameter of about five kilometers around the round tower.

The outer city is all the remaining space of the stone city, and here, it is also known as the rich area of the square city. After all, this is a gathering of all the powerful families in Sifang City, and similarly, some public welfare facilities in Sifang City are also located in this outer city.

For the people in the Sifang City, being able to live in a wealthy area is the perfect embodiment of identity. However, not every family can live here for generations. Like He Yifei's previous family, it was driven by the times and finally declined, until the clansmen were completely expelled.

Outside of Stone City, it was originally a wilderness, but now, it has been thoroughly exploited by humans. It is the supply zone that is sandwiched between the slums and the rich.

The supply area, as the name suggests, all the existence here is to serve to promote the progress of human society. Among them, all the factories of materials necessary for society are also scattered within this supply area.

Of course, some of the idle broken land was also divided up by the powerful families in the Sifang City and turned into their own private property, specially planting some crops necessary for their lives, in order to slightly meet their increasingly dissatisfied needs.

Only by crossing the slums outside the supply area can you really reach the edge of the Sifang City, which is the last line of defense to protect the Sifang City, the armament zone.

The armament area has a depth of more than ten kilometers, and here, the vast majority of the troops of the Sifang City are gathered.

In the armament area, in addition to the extremely strong defense facilities at the steel walls in all directions, there are also a large number of traps arranged in it, just to temporarily slow down the attack rhythm of those desolate ancient beasts after the city wall is lost.

However, the earth is huge, and the ancient beasts of the desolation also have their own strengths. In order to defend against the invasion of desolate beasts with the ability to control the sky, Sifang City also invested great energy and built countless tall towers in various areas.

These towers can not only provide lighting sources for the entire Sifang City, but also receive high-voltage power grid radiation from the circular white tower in the central area when birds invade, thus completely sealing the airspace of the Sifang City and preventing the birds from culling.

Of course, those towers also have another hidden function, that is, they are buried deep in the ground, and countless sonic jamming devices are also placed, so as to interfere with the invasion of desolate beasts from the underground by emitting sound waves.

So far, it is the entire pattern of the entire Sifang City, which is also the perfect city that human beings have finally created after more than 2,000 years of exploration.

Perhaps, in the future, human beings will occupy more barren forests through continuous expansion. But now, this square city has been able to provide a place of peace for human beings and ensure the continuation of civilization in human society.