Fleet

A Starfleet Fleet is a military unit consisting of numerous Starfleet starship vessels operating in groups, wings and flights, usually based at a Federation starbase or member planet's sector.

In the late 24th century several Starfleet Fleets were major participants in the hostilities brought about by the Dominion War. (Star Trek: Deep Space Nine)

List of units

 * Starfleet 8th Fleet (Andoria)
 * Starfleet 10th Fleet (Betazed)
 * Starfleet 12th Fleet (Starbase 19)