John Norris served for six years in the Grenadier Guards. He has travelled extensively and visited battlefields across the world. He escorts battlefield tours to Dunkirk, Normandy and Arnhem. He works as a columnist on several leading specialist military magazines and liaises with re-enactment groups, as well as classic military vehicle societies. He has written a number of military history titles, including Pistols at Dawn and Artillery: A History, Welsh Castles at War and Medieval Siege Warfare (The History Press).