The Confederation was located in the Gamma Quadrant, near the Idran star system terminus of the Bajoran wormhole. Before its conquest by the Dominion, Dosi territory was small, consisting only of the Dosa star system and its two nearest neighboring systems. The Dosi homeworld was Dosa II, and its capital was Relxer-D. (Last Unicorn RPG module: Star Trek: Deep Space Nine Core Game Book; ST reference: Star Charts)
- The Star Trek: Deep Space Nine Core Game Book states that the Dosi were subjects of the Dominion, while Star Charts says they were allied to the Dominion. It is not clear if this alliance represents a proper alliance, or is simply a term for Dominion control.