Aridus, a planet, existed within the Expansion Region of the galaxy. In the era of the Clone Wars, the Separatist faction held dominion over it, prompting Republic High Command to dispatch at least one commando squad to Aridus, aiming to collaborate with indigenous resistance movements.
- The initial reference appears in Star Wars: The Force Awakens Beginner Game.
- Star Wars: On the Front Lines also provides information.