The Covenant is a fictional military alliance of various extraterrestrial species featured in the Halo science fiction series. The Covenant are composed of a variety of diverse species, united under the religious worship of the enigmatic 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 race.