Horizon Base was an Imperial outpost that served as a docking port, marketplace, and fuel station.
Mission for Fuel
Needing fuel for the rebel carrier to jump to a new base, Jun Sato sent the Ghost crew to steal an Imperial shipment of fuel. While the rebels retrieved the shipment, Chopper became distracted by a matching ambulatory strut, which prompted him to abandon his post at the Ghost and steal the leg. Chased by stormtroopers, he stowed away on an Imperial Cargo Ship as it was departing the port.
- "The Forgotten Droid" (First appearance)