The Covenant are a fictional theocratic military alliance of alien races who serve as the main antagonists in the first trilogy of the Halo video game series. They are composed of a variety of diverse species, united under the religious worship of the Forerunners and their belief that Forerunner ringworlds known as Halos will provide a path to salvation. After the Covenant leadership—the High Prophets—declare humanity an affront to their gods, the Covenant prosecute a lengthy genocidal campaign against the technologically inferior human race.