 William II of Sicily had died the previous year, and was replaced by Tancred, who imprisoned Joan of England—William's wife and King Richard's sister.Richard captured the city of Messina on 4 October 1190 and Joan was released.Richard and Philip fell out over the issue of Richard's marriage, as Richard had decided to marry Berengaria of Navarre, breaking off his long-standing betrothal to Philip's half-sister Alys.