The Drakon Empire is an inter-galactic empire that presumably encompasses several planets and species. The centre is Drak, home to the Drakon people. Society is led by Master Scholar (House of Knowledge), Sister Haggra (House of Magic) and Emperor Brokken (House of War). The Empire's main goal is to relocate their Chaos Emeralds, ancient stones stolen by an old Echidna tribe that contain their store of Chaos energy. With these, they can rule the entire universe. Currently, they are embroiled in a war with Mobius through puppet ruler Doctor Robotnik.
For more information, see Drakon, Planet Drak and the Drakon story arc.