In theory, the entire "Six Armies" belonged to Master Hale, and King Frederic, who was a loyal confidant of Master Hale, should not be exploiting the army for his personal interests without his consent.
But in reality, such indiscretions were quite common.
Once the Hiring Immortal General proposed the idea, King Frederic agreed without hesitation. hence, before Lord Sun set off, the commanders of the "Six Armies" found the time for their first meeting. They quickly agreed on the following cooperation arrangements. The benefits from "One Heaven" were too lucrative, so they were willing to make some concessions knowing they would still gain a great deal.
Lord Sun also took this opportunity to inquire about "One Heaven" through King Frederic. Usually, the king didn't pay much attention to places like "One Heaven". After all, he was past the stage of seeking fortune through risks and had settled into a comfortable, wealthy retirement.