The carrier was brought to Concord to destroy any enemy trackers and then sent to Mars where any valuable data was collected. It was toured around from August 2577 to November 2577 as a war trophy. For six months a crew was trained to use the captured CAS-class carrier. In March 2578, the former Covenant carrier joined the Magellan galaxies expedition fleet, as well as to test her energy projectors.
After several months of trials, the Retribution was tasked to its own group consisting of the another CAS-class Assault carrier, the Breath of Annihilation, one CPV-class Heavy Destroyer the Radiant Perception, four CCS-class battlecruisers and one SDV-class heavy corvette Mayhem.