Surveillance was a branch of the Imperial Security Bureau. The largest branch within the ISB, Surveillance accounted for almost thirty-five percent of the Bureau's manpower. The personnel form Surveillance were generally drawn from Sub-Adult Groups, CompForce Observers, veteran officials from the Sector Monitors, or personnel from Sector Development. Surveillance's mandate was to uncover those individuals or activities that would either pose a threat to the Galactic Empire and its operations, or assist its enemies, such as the Alliance to Restore the Republic. If sufficient evidence in either case was found, the matter was turned over to Investigations for further action. Surveillance was also employed as a deterrent; the citizen's fear of the branch and the Galactic Empire stopped many from supporting the Rebellion.
- Imperial Sourcebook
- Death Star Technical Companion
- Galaxy Guide 9: Fragments from the Rim
- Death Star Technical Companion, Second Edition
- Imperial Sourcebook, Second Edition
- Star Wars: Edge of the Empire Core Rulebook
- Star Wars: Imperial Handbook: A Commander's Guide