The Gibraltar Crusade: Castile and the Battle for the Strait - Paperbackby Joseph F. O'Callaghan (Author) The epic battle for control of the Strait of Gibraltar waged by Castile, Morocco, and Granada in the late thirteenth and early fourteenth centuries is a major, but often overlooked, chapter in the history of the Christian reconquest of Spain. After the Castilian conquest of Seville in 1248 and the submission of the Muslim kingdom of Granada as a vassal state, the Moors no longer loomed as a threat and the reconquest