Coalition of Planets
A precursor to the United Federation of Planets, the Coalition of Planets was a loose alliance whose formation was discussed in 2155 by various Alpha and Beta Quadrant governments.

Formation

The Romulan Star Empire attempted to politically destabilize the region of space between the Alpha and Beta Quadrants. This resulted in the Babel Crisis, which was resolved by  between Humans, Vulcans, Andorians, and Tellarites. () Starfleet captain Jonathan Archer, commanding officer of , started working to expose Romulan manipulation of interstellar events.

Initial talks for the formation of the Coalition took place on Earth in San Francisco, and the participants included dignitaries from United Earth, , the Andorian Empire, Rigel, Denobula, Coridan, and Tellar Prime. ()

The initial conference was organized by United Earth Minister Nathan Samuels, who sought to build upon the work begun the previous year by Archer. The conference was disrupted when the terrorist organization Terra Prime threatened to destroy Starfleet Headquarters unless every non-Human left the Sol system within a day. 

While Terra Prime was thwarted in this attempt, its creation of a Vulcan/Human hybrid prompted a great many outraged xenophobic protests among UE citizens that threatened to derail the creation of the Coalition, including demonstrations outside of the Vulcan Consulate and the Andorian Embassy. 

Following the intervention of Archer and his crew as well as the death of Elizabeth, the cloned daughter of Charles Tucker III and T'Pol, however, the various dignitaries began to work in earnest to forge the alliance. ()

The Coalition was the precursor to the United Federation of Planets, six years before its founding, and was made up of several worlds who later became integral to the formation and early history of the Federation. ()

Representatives at the conference
 Andorian
 Thoris
 Unidentified
 Andorian delegate
 Andorian delegate
 Coridanite
 Coridanite ambassador
 Denobulan
 Denobulan ambassador
 Human
 Nathan Samuels
 Unidentified
 Starfleet commodore
 Starfleet rear admiral
 Starfleet vice admiral
 Ktarian
 Ktarian dignitary
 Rigelian
 Rigelian ambassador
 Rigelian ambassador
 Tellarite
 Tellarite delegate
 Tellarite delegate
 Tellarite delegate
 Unidentified
Five unidentified delegates
 Vulcan
 Soval
 Unidentified
 Vulcan delegate
 Vulcan delegate

External link 
  

cs:Koalice planet
de:Koalition der Planeten
ja:惑星連合
pl:Koalicja Planet
Intergovernmental organizations