Michael Whitby was formerly Professor of Classics and Ancient History at Warwick and is now pro-vice-chancellor and head of the College of Arts and Law at the University of Birmingham.

He has published several articles on late Roman warfare and been involved as co-editor in The Cambridge Ancient History XIV- AD 425 600 (2000).

Adrian Goldsworthy studied at Oxford, where his doctoral thesis examined the Roman army, and became an acclaimed historian of Ancient Rome. He is the author of numerous books, including Caesar, The Fall of the West, Pax Romana, and most recently Hadrian's Wall. Brigantia completes the trilogy of novels about Flavius Ferox including Vindolanda and The Encircling Sea.

Kate Gilliver is a senior lecturer in Ancient History at Cardiff University and author of The Roman Art of War (1999).

She has written several books and articles on Ancient Rome and was the historical consultant for a BBC Timewatch programme on Roman soldiers.