Sector Four, alternatively known as Sector 4, existed within the Hoth system found in the Anoat sector. The Galactic Empire's Death Squadron made its presence known above the planet Hoth in Sector 4 amidst the Galactic Civil War fought between the Alliance to Restore the Republic and the Empire. Years later, in 34 ABY, The Rebel Files were uncovered on Durkteel and ultimately made their way to General Leia Organa of the Resistance. Organa added a note concerning the arrival time of Imperial troops in Sector 4 on a paper connected to the Battle of Hoth.