This volume offers insights into the nature of warfare, diplomacy and peacemaking on the Iberian Peninsula during the Middle Ages, and the influences and entanglements resulting from these processes. The essays collected here emphasize both violent conflict and the brokering of allegiances and settlements, either within polities and common endeavours or between rival entities (such as the taifas of Seville and Badajoz in the fractious eleventh century). The volume begins with an account of Muslim warlords who sought service under Christian rulers in the tenth century and their historiographical fates, and embraces the whole of the Iberian Peninsula, from its western coast, in an analysis of the tightrope walked by the Galician monastery of Oia in maintaining its Portuguese domains at times of bitter conflict between Castile and its neighbour, to its eastern coast, as Catalan and Aragonese merchants coped with pirates and state-sponsored confiscation in the fifteenth century.