Covenant (Earth-2042)

"Creatures of the Covenant: the path is broad, and we shall walk it side by side!"

- High Prophet of Truth

The Covenant, also referred to as the Covenant Hegemony, was a massive religious hegemony of multiple sentient species that controlled a significant portion of the Mid Rim in the galaxy for thousands of years. Originally a mutual alliance between the San'Shyuum and the Sangheili, the Covenant expanded to include six other species united in the worship of the mythified Forerunners and the Halo Array.

Ruled by the High Prophet of Truth along with High Prophets Mercy and Regret during the waning years of the Galactic Republic, the Covenant waged a genocidal campaign against the Republic until they were defeated, until resurfacing for war once more as one of the member states of the Confederacy of Independent Systems during the Clone Wars. Despite being one of the most powerful military forces in the known galaxy, internal conflict combined with stubborn resistance were formidable enough to shatter the bonds that held the empire together. This internal conflict broke the Covenant in two, forcing out the Sangheili which allowed the Republic to strike a blow against them.

Source

 * https://www.halopedia.org/Covenant