Csaus was an astronomical object located in the territory of the Unknown Regions government named the Chiss Ascendancy. In 18 BBY, during a crisis in the Ascendancy, a battle was fought at Csaus between the Tahmie and Droc families, wherein Chiss Defense Force Admiral Ers'ikaro's Firewolf man-of-war Bellicose stopped the conflict before it could further escalate. Another conflict took place at Csaus late during the crisis.
In the current Star Wars canon, Csaus was first mentioned in the 2021 novel Thrawn Ascendancy: Lesser Evil, the final volume of the Star Wars: The Ascendancy Trilogy, written by Timothy Zahn. In the Star Wars Legends continuity, the planet Csaus was introduced in Daniel Wallace and Jason Fry's 2009 reference book The Essential Atlas.
In the current Star Wars canon, Csaus was first mentioned in the 2021 novel Thrawn Ascendancy: Lesser Evil, the final volume of the Star Wars: The Ascendancy Trilogy, written by Timothy Zahn. In the Star Wars Legends continuity, the planet Csaus was introduced in Daniel Wallace and Jason Fry's 2009 reference book The Essential Atlas.