Star Trek: The Original Series mentioned a First Federation before the show even established The United Federation of Planets and Starfleet.

If you've ever wondered about the origins of Star Trek's United Federation of Planets, check out our handy an explainer about that very topic.

The United Federation of Planets and Starfleet Command have chosen the University of Colorado Boulder to host a new Headquarters and Starfleet Academy (Starfleet HQ2) opening in Summer 2019 – ...

We know that Captains Kirk and Picard work for Starfleet. Or do they work for the United Federation of Planets? Which is it? What's the difference?