Is there a territory in the world that does not belong to any country?
Yes, there actually is, and the man takes advantage of the opportunity of "conquest" to claim himself king and make his daughter a princess.
One might mistakenly assume that every territory in the world was occupied or claimed by a certain State.
Birtaville is a 2,060 square kilometer area between Egypt and Sudan, and neither country has any interest in claiming the territory, but both countries claim that the territory belongs to the other.
It has 0 inhabitants and the area is extremely desolate, but that didn't stop many people from trying to ascribe the territory to theirs, so an American father fulfilled his daughter's dream of turning her into a princess and apparently declaring herself king, and the story was so funny and moving that Disney bought the rights to bring it to the big screen.