The Milky Way Galaxy was divided almost equally between the four kingdoms.
But even among them, the Kingdom of Life-Authority had an upper hand in terms of territory. Despite that, the other kingdoms had never made an advance in the fourth quarter. The reason was simple.
This extra territory was useless. Useless because it didn't have any Mana. This useless territory was known throughout the galaxy as the Forgotten Realm. And the Dreamers, from common to nobles, wanted nothing but to let it remain forgotten for millenniums to come.
Even if one were to ignore this stretch of land, all the Kingdoms had their own secret regions, almost inaccessible to the Dreamers of weak hearts. Only those who lacked morals, or had enough strength to roam alone and didn't worry about betrayal, could venture into these regions.
But talking about those regions would be the matter of some other time.