Orderic Vitalis’ account of the battle at Bougtheroulde in 1124Galbert of Bruges’ account in “The Murder of Charles the Good” – https://www.fulcrum.org/concern/monographs/bv73c077qS. Morillo, Warfare under the Anglo-Norman Kings, 1066-1135 (1994)S. Morillo, ‘Hastings: an unusual battle’, in The Battle of Hastings, ed. S. Morillo (1996)M. Strickland, War and chivalry : the conduct and perception of war in England and Normandy, 1066-1217 (1996) R. Rogers, Latin Siege Warfare in the Twelfth Century (1992) J.F. Powers, A Society Organized for War: The Iberian Municipal Militias in the Central Middle Ages, 1000-1284 (1988): esp. ch 1 (1000-1157); on line at http://libro.uca.edu/socwar/war.htmor Powers’ more technical articles on organisation & devp’t of Aragonese & Castilian urban militias in Traditio, 26 (1970): 91-111, in Speculum 46 (1971): 641-655 [both on JSTOR] & in R.I. Burns, ed., The Worlds of Alfonso the Learned & James the Conqueror (1985) [Libro website]N. Hooper & M. Bennett, The Cambridge Illustrated Atlas of Warfare: The Middle Ages (1996)R.C. Smail, Crusading Warfare, 1097-1193, 2nd ed. (1995) [w/ bibliographical update by Ch. Marshall]