UNSC Tenth Fleet (AAO)

The UNSC Tenth Fleet, commonly referred to as the Reserve Fleet, is a sizable force of vessels held in reserve. The Fleet consists primarily of older ships.

Reorganization of '53
In 2553, the UNSC Navy reorganized its fleets; one battle fleet, one home fleet, and two patrol fleets - First through Fourth, respectively. A fifth additional fleet - one without a numerical designation - was also created: the UNSC Reserve Fleet.