UNSC Crucible is one of few Miracle-Class Super Carrier's, and was the second one to be built. It was finished in 2562, where it was handed to newly promoted Fleet Admiral David Reach. He lead many battles with The Crucible, such as the Battle of installation 02. In 2574, UNSC Crucible was almost destroyed during a brute raid on the shipyard it was in, and the fleet admiral was moved to another ship, UNSC Redeemer. The Crucible was repaired after about a year and returned to the fleet admiral.