The Tion Cluster is the Outer Rim region of space that comprises the majority of worlds under the protection of the Tion Hegemony. Encompassing the territory of the Allied Tion, Cronese Mandate, and Tion Hegemony sectors, the Cluster is a vast collection of worlds within the Tionese realm.

In historical terms, the Cluster has been known to include the territory of the surrounding sectors of Keldrath, Indrexu and Thanium. Today, the Hegemony claims these regions of space under the protectorate domain of the Greater Tion. Wherein Tionese law and customs are enforced throughout and on any planets and systems. Giving way to a more expanded idea of what the Cluster means to the Tionese.