Stephen Bull was Curator of Military History and Archaeology for Lancashire Museums, with responsibility for local regimental collections. He has worked at the National Army Museum and BBC in London and has also appeared in the TV series Battlefield Detectives. He has written numerous articles for specialist journals, including a number on the weapons and tactics of the First World War. His other books include several Osprey titles on the tactics of World Wars I and II, including most recently Churchill's Army, Allied Intelligence Handbook of the German Army and German Soldier's Pocket Manual. He lives in Preston, UK.

Adam Hook studied graphic design, and began his work as an illustrator in 1983. He specializes in detailed historical reconstructions, and has illustrated Osprey titles on subjects as diverse as the Aztecs, the Ancient Greeks, Roman battle tactics, several 19th-century American subjects, the modern Chinese Army, and a number of books in the Fortress series.

His work features in exhibitions and publications throughout the world. He lives in East Sussex, UK.