The Confederacy was ruled by a council that met in the "Hall of Heroes" in the city of Pela Tarem. In times of war the council appointed a tha'thot or supreme commander to head the combined military effort of the Breen states. (The Dominion War Sourcebook: The Fires of Armageddon)
- In the continuity established by the Pocket Books novels, the Breen were actually a group of several species, and the government was led by the Breen Domo.
In late 2381, the Confederacy signed a non-aggression pact with the So'ja Coalition, and joined in the fight against the United Federation of Planets in the Coalition War. (Star Trek: Pioneer: "Everything Changes")