The Roman Imperial Army of the First and Second Centuries AD, 3rd Ed. by Graham Webster (1998; ISBN 978-0806130002) Advanced Military Cultural – Webster’s work is more than an overview of the organization of the Roman army, but it covers everything from equipment, to tactics, to the soldiering culture itself. Webster’s work is fundamentally the best single read on the Principate Roman army. Roman Military Equipment: From the Punic Wars to the Fall of Rome, 2nd Ed. by M.C. Bishop and J.C.N. Coulston (2006; 978-1842171592) Intermediate Military – This is the best introductory work to the military equipment of the Roman army during the Principate, although it covers from the Middle Republic through Late Antiquity. Bishop and Coulston are some of the foremost experts on this topic in the field, and their research has fundamentally defined our view of the Roman army today.