Tác giả cổ đại

• Arrian Acies contra Alanos (đầu tk.2)
• Dio Cassius Roman History (giữa tk.3)
• Suetonius De vita Caesarum (đầu tk.2)
• Tacitus Agricola (cuối tk.1)
• Tacitus Annales (cuối tk.1)
• Tacitus Historiae (cuối tk.1)
• Vegetius De re militari (cuối tk.4)

Tác giả hiện đại

• Birley, Anthony (2002). Band of Brothers: Garrison Life at Vindolanda.
• Burton, G. (1988). The Roman World (J. Wacher ed.).
• Campbell, Brian (2005). "The Army" in Cambridge Ancient History 2nd Ed Vol XII (The Crisis of Empire 193-337).
• Davies, R.W. (1988). Service in the Roman Army.
• Duncan-Jones, Richard (1990). Structure and Scale in the Roman Economy.
• Duncan-Jones, Richard (1994). Money and Government in the Roman Empire.
• Elton, Hugh (1996). Frontiers of the Roman empire.
• Goldsworthy, Adrian (2000). Roman Warfare.
• Goldsworthy, Adrian (2003). Complete Roman Army.
• Grant, Michael (1985). The Roman Emperors.
• Hassall, Mark (2000). "The Army" in Cambridge Ancient History 2nd Ed Vol XI (The High Empire 70-192).
• Holder, Paul (1980). Studies in the Auxilia of the Roman Army.
• Holder, Paul (1982). The Roman Army in Britain.
• Holder, Paul (2003). Auxiliary Deployment in the Reign of Hadrian.
• Holder, Paul (2006). Roman Military Diplomas V.* Keppie, Lawrence (1996). "The Army and the Navy" in Cambridge Ancient History 2nd Ed Vol X (The Augustan Empire 30BC - 69 AD).
• Luttwak, Edward (1976). Grand Strategy of the Roman Empire.
• Mattingly, David (2006). An Imperial Possession: Britain in the Roman Empire.
• Jones, A.H.M. (1964). The Later Roman Empire.
• Rossi, L. (1971). Trajan's Column and the Dacian Wars.
• Roxan, Margaret (2003). Roman Military Diplomas IV.
• Spaul, John (2000). COHORS2.