Sector Command was a command unit of the Galactic Empire active during the Galactic Civil War against the Alliance to Restore the Republic. Subsector Command was a unit within the Sector Command. During the early rebellion against the Galactic Empire, Commander Brom Titus, Captain Brunson, and Captain Slavin were members of Sector Command and were in the Chimaera above Lothal during Grand Admiral Thrawn's campaign against Phoenix Cell.
In 5 ABY, after introducing herself to Colonel Soran Keize, Acting Governor Fara Yadeez reaffirmed to Keize that she was the rightful ruler of the planet Troithe after the death of Governor Hastemoor, until she was replaced by sector command or a higher authority.