Covenant army
From Halopedia, the Halo wiki
The Covenant Army is a branch of the Covenant Military responsible for land-based operations. It is the primary invasion force, and houses the numerous Special Operations units. [1]
Species In The Covenant Army
Pre Civil War
Post and During Civil War
During the Covenant Civil War, a significant majority of the [[Hunters, and a number of Grunts, defected to the Covenant Separatists, though they are never seen in Halo 3. Most Grunts, some Hunters, and the Jackals, Drones and Brutes remained in Covenant Loyalist military service. No Prophets are known to possess a military function, preferring to leave such matters to the Brutes.
Covenant Civil War
During the Covenant Civil War, or "Great Schism", the Army was split in two, Loyalists supporting the Prophets, and Separatists supporting the Arbiter.