Ring-city

A Ring city was a type of city, that could be found on the planet Kaikielius.

History
In 4,225 BBY, the Hutt Odominic kajidic began supplying black market arms to Kaikielius, resulting in a war in the planet's ring cities, between criminals and the police. The Galactic Republic sent troops to Kaikielius to intervene and they attacked the most criminal-infested ring cities.