The Spanish conquest of Oran and Mers el-Kebir took place from 15 June to 2 July 1732, between the Kingdom of Spain and the Deylik of Algiers. The great Spanish expedition led by Don José Carrillo de Albornoz, Duke of Montemar and Don Francisco Javier Cornejo defeated the Algerian troops under the command of the Bey of the Beylik of Oran, Mustapha Bouchelaghem, and the Wali of Oran, Hassan. It successfully conquered the fortress-cities of Oran and Mers el-Kebir, ruled and administered by Algiers from 1708, during the War of the Spanish Succession, when both cities were conquered by the aforementioned Bouchelaghem, who was the governor of the western regions of Algiers.