Star Trek Expanded Universe
For the 22nd century Earth organization, see Starfleet (Earth).
For the mirror universe counterpart, see Starfleet (mirror).
For the Lyran organization, see Lyran Starfleet.

Starfleet Command logo

Starfleet logo

The Federation Starfleet (commonly referred to as Starfleet) is the deep-space exploratory, scientific, diplomatic, and military force of the United Federation of Planets.


Formed as an integral part of the United Federation of Planets Charter in 2161, the Federation Starfleet incorporated elements of its founding members space-faring agencies, including Earth's own Earth Starfleet and its secret organization, Section 31. (DS9: "Inquisition"; ENT: "Detained", "Divergence")

The Earth Starfleet may also have been known as the United Earth Stellar Navy (UESN) in other continuities, such as that for Orion Press or The Starfleet Museum. Also, in FASA's RPG materials, many pre-Federation Earth starships had the designation UNSS presumably because the United Nations had its own space exploration agency.

Missions undertaken by the Federation Starfleet fell at least partly under the jurisdiction of the United Earth Space Probe Agency (or UESPA) as late as the 2290s. By the mid-24th century Starfleet missions were regulated solely by Starfleet Command, answering to the Federation Council and bound by its General Orders and Regulations. (TOS: "Charlie X", "Tomorrow is Yesterday"; Star Trek IV: The Voyage Home; et al)

When a planet became a member of the Federation, its military would be incorporated within Starfleet. (DS9: "Rapture")


By the time of the Dominion War Starfleet organized its fleet into the following groupings from smallest to largest: squadron, wing, tactical wing, fleet. (The Dominion War Sourcebook: The Fires of Armageddon)

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Background information[]

  • Ronald D. Moore commented: "I've always felt that Starfleet is the military/exploratory/scientific arm of the UFP." [1]
  • Remarking on a Starfleet JAG getting involved with a civilian case with Richard Bashir, Moore said: "Starfleet is more than just a military entity and seems to have police and/or judicial functions." [2]

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