Osa-Prime served as the primary capital for the world of Osarian, a planet. In the course of the Osarian-Rhommamool conflict, Nom Anor gave the command to launch a missile attack targeting the city. This occurred when Osarian and Rhommamool's orbital paths brought them nearest to each other. The attack obliterated the city, and this act directly led to the rise in political tensions, resulting in an all-out war.