Starfleet 10th Fleet

The Tenth Fleet was a battle group of the Federation Starfleet during the Dominion War. In late 2374, the Tenth Fleet was lead by Admiral Masc, and assigned to defend the planet Betazed. However, the Tenth Fleet was badly crippled and forced to retreat from the planet when attacked by Jem'Hadar and Cardassian forces. (short story: "The Ceremony of Innocence is Drowned")