The Royal Allegiance was the governing body of the Theran species whose territories covered controlled a conglomeration of over 29 million worlds. A Tier 1 species, the Therans and the Allegiance outmatched the Covenant in terms of technological superiority but was inferior to the Forerunners. A major galactic power from its emergence in 2553, the Allegiance was a prominent participatory in several galaxy-wide events beginning with the Remnant War (2553-2559) and culminating in the apocalyptic Swarm War (2733-2878).