The Coalition Worlds were a league of planets and solar systems within Wild Space, the portion of the galaxy of Galactic Prime situated between the Galactic Republic and the Unknown Regions. They were also close to the Ssi-ruuk Imperium, and occasionally fought armed conflicts with the Ssi-Ruuk. The main worlds of the Coalition Worlds were Chi-town, Free Quebec, Iron Heart, El Dorado, Missouri, and Lone Star.