The Bilini once held Orions in slavery by the Treaty of Kammzdast until they were liberated in the Orion War of 94–56 BCE (reference stardates −20/9401.03–5602.13). Afterwards, the Bilini civilization fell into decline while Orions rose in their New Days.
Most Bilini lived among the Orions, while a few dwelled on preserves that were protected by law. For its government and legal protection of the Bilini, which the Federation quite appreciated, Namezk was known as "The Last Free Orion World". (FASA RPG - The Orions module: Book of Common Knowledge)