Leviathan was divided into inner and outer layers, covering an area twice the size of the imperial capital.
The City Lord's Mansion stood at the center of the city, essentially equivalent to the imperial palace within the imperial capital.
It not only represented the strongest military force within the city, but also served as the command center directing the frontline Professionals in battle.
That said, the Underground City's way of fighting was rather bizarre.
They had no organized legions. Once battle began, they simply swarmed forward.
Their only advantage was that they did not interfere with one another and could ensure support for allied forces within the limits of their own range and abilities.
If a well-trained army was like a bulldozer, then they were like an extraordinarily strange fishing net.
At first glance, they seemed insignificant.
To generals skilled in warfare, the Underground City's style of attack had initially seemed like nothing more than child's play.
Yet once they truly came into contact with it, they put aside such thoughts.
First, in terms of coordination, the other side surpassed the armies of the Douluo Continent.
If not for the buffs provided by their allied formations, Military Flags, and commanders, they would not have been able to suppress the Professionals at all.
Second, although it looked chaotic on the surface, only through actual contact could one discover the mystery within.
At the very least, Wang Jian and the others had developed an Army Breaking Formation composed of squads based on the enemy's unique Battle Formation.
That Battle Formation had yielded impressive results from the moment it entered the field.
Not only had it trapped three Professional Mentors to death, but it had also slaughtered several million enemy troops.
If the enemy's reinforcements had not arrived in time, and if Wang