17-Gamma-F was the Dominion designation for one of their strike fleets that took part in the Dominion War. Starfleet referred to the fleet as Betazed-12. The fleet was commanded by the Vorta Chelek'toran Harone. Most of the fleet was destroyed when the Federation Alliance liberated Betazed. (The Dominion War Sourcebook: The Fires of Armageddon)