Devotion
From Halopedia, the Halo wiki
The Devotion was a Covenant military vessel prior to its destruction.
The ship was attached to a cluster of Covenant ships that engaged UNSC forces in space-borne ship-to-ship combat. During the battle, Devotion was requested to cover Sacred Promise's dead zone. Twenty minutes away from taking position, Devotion was unable to prevent Sacred Promise from being hit again and subsequently crashed into a nearby moon, causing its further destruction.[1]