Gregory S. Aldrete is Professor Emeritus of History and Humanities at the University of Wisconsin-Green Bay. Winner of numerous national fellowships and awards as both a scholar and a teacher, his books about the ancient world include The Long Shadow of Antiquity: What Have the Greeks and Romans Done For Us? and Daily Life in the Roman City. His research has been featured in several television documentaries and in New Yorker magazine, Atlantic magazine, U.S. News and World Report, Der Spiegel magazine, and more.

Graham Sumner has written and illustrated publications on Ancient Rome for almost forty years. His works include three publications on Roman military clothing and he has written the only standard work on Roman military dress. Sumner wrote a series of articles for Ancient History magazine analyzing how the Roman army has been depicted onscreen, and was recently a historical advisor for the film, Illyricum.