After being extensively repaired and serviced, Redoubtable was returned to active service later that year, and later served during the Remnant War. In 2562, Redoubtable underwent a further refit which made use of advanced Human technology.
In late December, Redoubtable received orders from NAVCOM to undertake a small scale mission on the world of Ariel. Ariel was a distant colony world with a small population of civilian researchers and an ONI scientific facility. The distress call received by the UNSC reported no Covenant Navy forces and only a small land occupation force. The UNSC seized the opportunity to retaliate while Covenant forces were weak, and assigned the nearest two available frigates, Redoubtable and Resurgence, to destroy the enemy presence on Ariel's surface, in an action known by the UNSC as Operation: FIRESIDE. After deploying ODSTs to the planet's surface, Resurgence and Redoubtable remained on station for 72 hours at immediate readiness to provide orbital fire support should the ODSTs request it, however neither were able to due to the close proximity of captive civilians. Both frigates retrieved the ODSTs and waited for the arrival of a troopship and a prowler, which evacuated the planet's inhabitants and abandoned the planet.
Vengeance · Sheffield · Majestic · Final Effort · Hope · Make My Day · Starlit Sky · Dragon · Valiant · Fateful Journey · From the Dust Returned · Final Charge · Courageous · Warsaw · Conviction · Obliterator · Out of the Past · The Hammer Falls · Inheritance · From the Ruins · Payback's a Bitch · Full Circle · Howling Dark · Destiny's Child · Selborne · Daring · Victory