Kelly DeVries holds a PhD from the Centre for Medieval Studies at the University of Toronto. He is professor of history at Loyola University Maryland and has most recently written Medieval Weapons: An Illustrated History of their Impact (2007) and The Artillery of the Dukes of Burgundy, 1363-1477 (2006), both with Robert Douglas Smith. His other books include - Medieval Military Technology (1992); Infantry Warfare in the Early Fourteenth Century: Discipline, Tactics and Technology (1996); The Norwegian Invasion of England in 1066 (1999); Joan of Arc- A Military Leader (1999); A Cumulative Bibliography of Medieval Military History and Technology (2002; updated 2005); and Guns and Men in Medieval Europe, 1200-1500: Studies in Military History and Technology (2002), as well as several edited works. In addition he is the author of more than 60 articles on military history and the history of military technology. He currently edits the Journal of Medieval Military History and is the series editor for the History of Warfare series of Brill Publishing.

Count Niccol Capponi is a part of Florence's living history. His family has been in the city since the thirteenth century and he is a historian. After earning a PhD in military history from the University of Padova, he returned to Florence where he currently teaches political science and the history of Florence to Americans studying abroad. He is, most recently, author of Victory of the West: The Story of the Battle of Lepanto, as well as I Legionari Rossi: Le Brigate Internazionali Nella Guerra Civile Spagnola 1936-1939, a history of the international brigades during the Spanish Civil War.

Graham Turner is a leading historical artist, specializing in the medieval period. He has illustrated numerous titles for Osprey, covering a wide variety of subjects from the dress of the 10th-century armies of the Caliphates, through the action of bloody medieval battles, to the daily life of the British Redcoat of the late 18th century. The son of the illustrator Michael Turner, Graham lives and works in Buckinghamshire, UK.