UNSC Commonwealth (Earth-5875)

The UNSC Commonwealth was a Paris-class heavy frigate of the UNSC Navy. It notably fought during the Battle of Chi Ceti, where it was captained by Wallace Tobias.

Battle of Chi Ceti
In early 2525, the UNSC Commonwealth transported the SPARTAN-IIs and Dr. Catherine Halsey to the Damascus Testing Facility, on the Outer colony Chi Ceti IV. There, the Commonwealth engaged the Covenant CCS-class battlecruiser Unrelenting, marking the Battle of Chi Ceti IV. The ship was assisted by the SPARTAN-IIs, who boarded the Unrelenting using their newly commissioned MJOLNIR Powered Assault Armor/Mark IV, allowing the frigate to emerge victorious against the cruiser, which was destroyed.

Severely damaged, however, the Commonwealth rendezvoused with the UNSC Persian Gate, transfering Halsey and the SPARTANs to it. The ship returned to Reach, where it was repaired, and returned to fight in the First Contact War.

Decomissioning and eventual scrapping
Years later, the Commonwealth was eventually decomissioned, and its parts landed at the Asźod shipyards for scrapping. During the Fall of Reach, Asźod became one of the last sites of the planetary battle between the UNSC and the Covenant.

On August 30th, 2552, David-B312 and Emile-A239 passed through the wreckages of the Commonwealth alongside the Auton synthetic Cortana in order to deliver her to the UNSC Pillar of Autumn.