Once a fledgling human empire but nearly 1900 years ago, a minor duke of some great hell led an effort to take it over. Who can blame them, the hells seem like a bad place to be. So, they took this once human empire over through a combination of bargaining, subterfuge, and force. And once they did it, and pushed what was an already spreading empire even further in that direction.
The Throne of Dominion, also known as the First Canton, is a territory in the world of Sangfielle and the seat of power of the Aldominan empire.
Duvall was born in the First Canton, and Es may also have been.