Just had a listen to this mp3 lecture, it's an interesting one- "Western Warfare in the Age of the Crusades, 1000-1300 John France US Military Academy at West Point, Swansea University, Wales, UK, recorded April 27, 2012; 1 hr 37 min. click here to listen (or right-click to download) nymas.org NYMAS is devoted to increasing public knowledge, awareness, and understanding of the interrelationship of war, society, and culture through the presentation and dissemination of diverse scholarly viewpoints." John France Lecture: Western Warfare in the Age of the Crusades, 1000-1300 (MP3)
