Roman emperors from Augustus to Julian --Maps of the Roman Empire -- "Arrest me, for I have run away": fugitive slave hunting in the Roman Empire -- "Like a thief in the night": self-help, magisterial authority, and civilian policing -- "I brought peace to the provinces": Augustus and the rhetoric of imperial peace -- "To squelch the discord of the rabble": military policing in Rome and Italy under Augustus' successors -- "Let there be no violence contrary to my wish": emperors and provincial order -- "Keep your province pacified and quiet": provincial governors, public order, and policing -- "Military stations throughout all provinces": detached-service soldier-police -- Appendix: Differentiating stationarii from beneficiarii consulares and other detached-service soldiers.