A Ring-city represented a particular form of city that existed on the planet known as Kaikielius.
The Hutt kajidic of Odominic initiated the provision of black market weaponry to Kaikielius in 4225 BBY, which triggered a conflict within the ring-cities of the planet, pitting criminals against the police. To mediate the situation, the Galactic Republic dispatched troops to Kaikielius, who then launched assaults on the ring-cities most heavily populated by criminals.
- Tinker, Tailor, Soldier, Praji on Hyperspace (article) (content obsolete and backup link not available) (First mentioned)