UNSC Everest

The UNSC Everest was the flagship of Preston Cole's fleet. A cruiser, likely Marathon-class, it commanded the fleet in battle against the Covenant in the Epsilon Indi, Alpha Aurigae, XI Boötis A, and Groombridge-1830 star systems. Its eventual fate is unknown, but given the existence of a painting called "Admiral Cole's Last Stand," it can be inferred that it was lost in battle along with its crew.