This political alliance represented worlds that worked toward a common set of goals and needs during the last decades of the Galactic Republic. The Commonality was ruled from the planet Columex, which provided access to the five sectors via the Perlemian Trade Route. This political group formed an important collection of swing votes in the badly divided Galactic Senate.
The Commonality was initially an alliance made between star systems of the Vorzyd Cluster after the discovery of the cluster by the Galactic Republic during the Draggulch Period. Five centuries later, the Vorzyd Cluster attracted Commenorian investors, including the Greyshade family, who settled on Columex and began trading with the cluster. Columex joined the confederacy and, in a few generations, the aggressive Columexi traders allowed Columex to take control of the entire Commonality. The Commonality was expanded and eventually joined the Republic as a quintet of sectors.
When the Republic fell, Senator Simon Greyshade declared a state of emergency in the Commonality. Greyshade later agreed the Galactic Empire to seize a part of the Commonality gambling profits in exchange of the control of the Wheel, a space station located in the Mid Rim, to a Columexi company controlled by Greyshade. Simon Greyshade remained senator until the dissolution of the Imperial Senate. The Commonality was later ruled by a Moff, Diedrich Greyshade
- Star Wars: Republic: Honor and Duty (First mentioned)