The Rebel marines, also called the Alliance marines, and whose organization was the Marine Corps, were soldiers belonging to the Alliance to Restore the Republic. They participated in the Galactic Civil War fighting against the forces of the Galactic Empire. Functioning as a specialized unit within the Rebel Alliance Special Forces, they acted as commandos and gained a reputation for their courage and toughness.
During the assault of the Imperial security complex located on the planet Scarif, which is situated in the Outer Rim, a group of Rebel Marines participated. Among them were Privates Arro Basteren and Farsin Kappehl, who wore camouflage appropriate for the tropical climate of the planet.