"Break the balance? What, they wanted to control the whole continent?"
Vincent asked with confusion. The Red Alliance is not that strong at all. The reason why they managed to stay safe from the human organizations was because of the environment of their territory and because the Barbarian Kings started to band together.
In short, there would be a lot of casualties once they tried to eliminate the Red Alliance. The other organizations didn't want to weaken their forces if not extremely necessary. So instead of waging war, they decided to just recognize the territory of the Red Alliance.
They won't even have to worry about the minerals that the barbarians will collect in their territory. After all, these minerals will just be traded for food or various tools that weren't that too important for the human organizations but very valuable for the Barbarians with only natural minerals surrounding them.
That's right, the Red Alliance's territory is not that suited for human settlements.