David Nicolle worked in the BBC Arabic service for a number of years, before gaining an MA from the School of Oriental and African Studies, London, and a doctorate from Edinburgh University. He later taught world and Islamic art and architectural history at Yarmuk University, Jordan. He has been a prolific author of Osprey titles for many years. Witold Sarnecki is a Polish museum curator who specialises in the medieval armies of Poland. Gerry Embleton is an internationally respected authority on military costume and material culture. He has illustrated more than 40 Osprey titles. His company Time Machine AG has made 3D life sized historical figures for more than 60 museums world-wide.