The twenty-first volume of the Journal of Medieval Military History begins with three studies examining aspects of warfare in the Latin East: an archaeological report on the defenses of Jerusalem by Shimon Gibson and Rafael Y. Lewis; a study of how military victories and defeats (viewed through the lens of carefully shaped reporting) affected the reputation, and the flow of funds and recruits to, the Military Orders, by Nicolas Morton; and an exploration of how the Kingdom of Jerusalem quickly recovered its military strength after the disaster of Hattin by Stephen Donnachie. Turning to the other side of the Mediterranean, Donald J. Kagay analyzes how Jaime I of Aragon worked to control violence within his realms by limiting both castle construction and the use of mechanical artillery. Guilhem Pépin also addresses the limitation of violence, using new documents to show that the Black Prince's sack of Limoges in 1370 was not the unrestrained bloodbath described by Froissart. The remaining three contributions deal with aspects of open battle. Michael John Harbinson offers a large-scale study of when and why late-medieval men-at-arms chose to dismount and fight on foot instead of acting tactically as cavalry. Laurence W. Marvin reconsiders the Battle of Bouvines, concluding that it was far from being a ritualized mass duel. Finally, Michael Livingston elucidates some principles for understanding medieval battles in general, and the battle of Agincourt in particular.