The Castilian War took place in 1570-1578 and represented the last crusade in Islamic history between the Spanish Empire and the Sultanate of Brunei; the Sultanate of Sulu, the Sultanate of Maguindanao, and the Ottoman Caliphate.Sultan Saiful Rijal once sent a letter to Sultan Murad III to ask for help and continue diplomacy. In 1578, the Spanish army was successfully expelled from the State of Brunei.