- This article is about the United Earth Starfleet. You may also be looking for the Federation Starfleet.
- For the mirror universe counterpart, see Imperial Starfleet.
The United Earth Starfleet, often known simply as Starfleet, was founded as the space agency of United Earth in the mid 22nd century. After the formation of the United Federation of Planets it served as the model for Federation Starfleet and was merged into it. (ST reference: Federation: The First 150 Years, A Choice of Futures)
An early iteration of Starfleet was founded in the early 21st century as part of the United Nations, working alongside NASA to promote science and spaceflight. At this juncture Starfleet did not actually control any space vehicles. Sean Christopher was an early trainer there. It is not known whether this Starfleet grew into the United Earth Starfleet, or merely provided the inspiration for it. (ST performance: Star Trek Live)
Starfleet was chartered in the early 22nd century, presumably as a branch of the United Earth Space Probe Agency. Jonathan Archer joined soon after its inception, after previously considering joining the Earth Cargo Service.
In 2151, Starfleet launched Enterprise NX-01 its first Warp Five vessel, followed in 2153 by Columbia NX-02. These two ships were largely responsible for establishing United Earth as a legitimate interstellar power and paving the way for the founding of the Federation.
Unlike its future incarnation, the Earth Starfleet was not a military organization, but rather was purely scientific and exploratory in its mission. MACOs fulfilled any military functions needed aboard Earth Starfleet vessels. (ENT episode: "The Expanse")
This separation of roles underwent modification with the creation of the Coalition of Planets, and in the lead-up to the Earth-Romulan War, when Starfleet was called upon more and more to provide defensive and offensive service. (ENT novel: Kobayashi Maru, ST - Destiny novel: Gods of Night)
After the foundation of the United Federation of Planets, Earths Starfleet was merged into the Federation Starfleet along with the Andorian Imperial Guard, Vulcan Space Council and the space agencies of Tellar and Alpha Centauri. It still exists and adminisiters their own ships.
Federation Starfleet adopted a common uniform for all federation member space agencies. To distinguish members of agencies each kept a unique insignia. Earth Starfleet used the UESPA arrowhead symbol. 
- Admiral Maxwell Forrest - commanding officer until his death in 2154 on Vulcan.
- Admiral Samuel Gardner - successor to Admiral Forrest following his 2154 death.
- Admiral Gregory Black
- Admiral Clark
United Earth Starfleet ships
- Constellation' (prototype)
- Intrepid-class cruiser
- Neptune-class survey ship
|Andorian Imperial Guard • Bajoran Militia • Benthan Guard • Breen Militia • Cardassian Central Command (Cardassian Guard) • Cardassian Self Defense Force • Earthfleet • Federation Starfleet • Klingon Defense Force • Romulan Republican Force • Romulan Star Navy • United Earth Starfleet|
|Incarnations of Starfleet|
|United Nations Starfleet • United Earth Starfleet • Terran Imperial Starfleet • Federation Starfleet • Federation Galfleet • Mega-Federation Universal Fleet • Interstellar Union Interstellar Guard • Interstellar Coalition Space Command • Earthfleet|
The serial novel Starfleet: Year One used the name Earth Command to identify the controlling authority of Earth's defensive forces during the Earth-Romulan War. As it was written prior to the debut of Star Trek: Enterprise, much of what it establishes about pre-Federation Earth has been contradicted.
- In the Year 2255...
- A Choice of Futures, Chapter 1
Admiral Archer was still getting used to the sight of him in the new Federation Starfleet uniform. Although the various space agencies of the UFP’s five founding members still existed and oversaw their own ships and specialties within the combined fleet they jointly administered, they’d agreed they should adopt a common uniform with elements reflecting all its member states.
- A Choice of Futures, Chapter 1:
She [T'Pol] wore the UESPA arrowhead on her breast rather than the circle-and-triangle IDIC patch of the Vulcan Space Council; after all, it was an Earth-administered ship she commanded, and she had been a member of Earth Starfleet for seven years before the services were combined.