The Covenant Separatists were the forces composed of all the ejected Sangheili from the Great Schism, as well as their followers. When the Great Schism broke out on November 3 2552, the entirety of the Sangheili species were forced out of the Covenant. When the High Prophet of Truth orderedthe Covenant military, now led by the Jiralhanae, to massacare the Sangheili, the two became enraptured in conflict.
Within the Covenant Separatists, only the Fleet of Retribution allied with humanity during the final battles of the war.
After the Covenant Sepratists were victorious in destroying the Covenant that had betrayed them, they split off into several different factions. The Sangheili who were in the Fleet of Retribution would later form a faction known as the Swords of Sanghelios, which would become the official government of Sanghelios.