The Battle of Alcácer Quibir in 1578 saw the death of the young king Sebastian. Sebastian's granduncle and successor, Cardinal Henry, was 66 years old at the time. Henry's death was followed by a succession crisis, with three grandchildren of Manuel I claiming the throne: Infanta Catarina, Duchess of Braganza (married to John, 6th Duke of Braganza), António, Prior of Crato, and King Philip II of Spain. António had been acclaimed King of Portugal by the people of Santarém on July 24, 1580, and then in many cities and towns throughout the country. Some members of the Council of Governors of Portugal who had supported Philip escaped to Spain and declared him to be the legal successor of Henry. Philip marched into Portugal and defeated the troops loyal to the Prior of Crato in the Battle of Alcântara. The troops occupying the countryside (Tercios) commanded by the 3rd Duke of Alba arrived in Lisbon. The Duke of Alba imposed on the Portuguese provinces a subjection of Philip before entering Lisbon, where he seized an immense treasure; meanwhile, he allowed his soldiers to sack the vicinity of the capital. Philip was recognized as king by the Cortes of Tomar in 1581, beginning the reign of the House of Habsburg over Portugal. When Philip left in 1583 to Madrid, he made his nephew Albert of Austria his viceroy in Lisbon. In Madrid he established a Council of Portugal to advise him on Portuguese affairs.