The Dellalt system, a star system situated within the Outer Rim Territories, was home to the planet Dellalt.
During the Galactic Civil War, specifically in 1 BBY, a vessel called the Bixby defected from an Imperial convoy that was traversing the Dellalt system and joined the Rebel Alliance. The crew of the Bixby provided the Alliance with intelligence regarding Operation Strike Fear. Subsequently, during a reconnaissance operation, pilot Keyan Farlander spotted an Imperial fleet amassing within the confines of this system. Furthermore, the Dellalt system served as the location for a skirmish involving Imperial Navy forces, commanded by the Victory-class Star Destroyer known as the Formidable, and four squadrons comprised of Rebel X-wing and A-wing starfighters, including the renowned Rogue Squadron.