Battle for Earth/Participants
From Halopedia, the Halo wiki
The Covenant used a lot of different types of ground vehicles during their siege. The Type-32 Rapid Assault Vehicle were deployed early on, but were eventually overtaken by the Type-25 Rapid Assault Vehicle. As land transportation, the Covenant used the Type-29 Troop/Vehicle Transport. As their main battle tank, the Covenant used the Type-26 Assault Gun Carriage. Their main anti-air vehicle was the Type-52 Anti-Aircraft Artillery. Finally, to assist in breaking down any defenses, the Covenant used the feared Type-47 Ultra Heavy Assault Platform in both the Protos variant, and the Deutoros variant.
The Covenant's main ground attack aircraft was the Type-26 Ground Support Aircraft. Two variants of which were used during the battle; the T26A and the T26C. The Type-52 Troop Carrier was also used as a cargo transport for the Covenant.