Warfare in Roman Europe AD 350–425 by Hugh Elton (1996; ISBN 978-0198150077) Advanced Political Social Military – Hugh Elton’s overview of Roman and Germanic society and warfare is fundamentally the best single work on this topic, as he describes everything from Germanic political organization and how that related to their military operations, to the limitations of Roman logistics, as well as the tactics and strategies of both peoples themselves. Warfare and Society in the Barbarian West 450-900 by Guy Halsall (2003; ISBN 978-0415239400) Twilight of Empire: The Roman Army from the Reign of Diocletian until the Battle of Adrianople by M.J. Nicasie (1998; ISBN 978-9050634486) Intermediate Military – Nicasie’s book is an excellent overview of the fourth century Roman army. He looks at the big picture stuff, such as Diocletian’s and Constantine’s reforms, grand strategy, and the total organisation and distribution of the army. He provides insights into hot topic issues like barbarisation. Finally, he present two fascinating case studies, the 357 Battle of Strasbourg and the 378 Battle of Adrianople.