Nic Fields, is a former Royal Marine Commando turned classical scholar and now full-time military historian and tour guide. Among his many previous works are Warlords of Republican Rome: Caesar versus Pompey (2008), Roman Conquests: North Africa (2010), The Spartan Way (2012), AD 69: Armies, Emperors and Anarchy (2014), God's City: Byzantine Constantinople, and God's Victory: Lepanto 1571 (forthcoming 2020), all published by Pen & Sword.