The Portuguese Diogo Rodrigues explored the Indian Ocean in 1528, he explored the islands of Réunion, Mauritius, and Rodrigues, naming it the Mascarene or Mascarenhas Islands, after his countryman Pedro Mascarenhas, who had been there before. The Portuguese presence disrupted and reorganised the Southeast Asian trade, and in eastern Indonesia they introduced Christianity. After the Portuguese annexed Malacca in August 1511, one Portuguese diary noted 'it is thirty years since they became Moors'- giving a sense of the competition then taking place between Islamic and European influences in the region. Afonso de Albuquerque learned of the route to the Banda Islands and other 'Spice Islands', and sent an exploratory expedition of three vessels under the command of António de Abreu, Simão Afonso Bisigudo and Francisco Serrão. On the return trip, Francisco Serrão was shipwrecked at Hitu island (northern Ambon) in 1512. There he established ties with the local ruler who was impressed with his martial skills. The rulers of the competing island states of Ternate and Tidore also sought Portuguese assistance and the newcomers were welcomed in the area as buyers of supplies and spices during a lull in the regional trade due to the temporary disruption of Javanese and Malay sailings to the area following the 1511 conflict in Malacca. The spice trade soon revived but the Portuguese would not be able to fully monopolize nor disrupt this trade.