Onderon, in the three-planet system of the same name, circles a yellow sun and has four moons with widely-varying orbits. The closest moon, Dxun, is home to numerous bloodthirsty creatures who are periodically able to migrate to the surface of Onderon, due to an annual period in which the two worlds' atmospheres intersect. The human inhabitants of Onderon gradually evolved defenses against the beasts, eventually culminating in the enormous walled city of Iziz.

Iziz is currently the stage of a full-scale political battle. There are no unauthorized departures except for those with Starport Visas, and even those are given out by customs & immigration sparingly, leaving many of its citizens in a state of unrest or panic.