Rhamsis Callo was the homeworld of the Schenor. It was located in the Danjar sector of the Outer Rim Territories. During the Galactic Civil War, the Schenor government signed a treaty with the Galactic Empire to allow construction of a base on the surface. The treaty was nullified by nest-guildmaster B'karitz after he learned of an Imperial-backed massacre of Schenor colonists at a research station.