Fan:Dark Imperium

The Dark Imperium is a legion of Digimon that appears in Digimon Ultima. The empire serves the Dragon Emperor, who seeks the Dark Digimentals for his mysterious plans. They are the remnants of an ancient digimon empire that have successfully taken over the mysterious continent known as the "Lost World", and have forced the citizens to work for them.

Five Commanders
The Five Commanders handle the day to day operations of the imperium, each one ruling over a different portion of the "Lost World". Each one is a particularly powerful Champion-Level Digimon that becomes a Mega-Level equivalent when it uses a Dark Digimental.