"Muslims first arrived on the Philippine archipelago as traders in the tenth century and were followed by Islamic missionaries about three hundred years later. Many tribesmen of the southernmost islands were converted, so that by the mid-fifteenth century the island of Sulu had emerged as a leading center of Islam. In subsequent decades, Muslim rule reached as far as Luzon, the northern island, though when the Spanish explorer Magellan arrived in 1521, the Islamic faith had gained a firm hold only in the south. The Spanish government under Charles V (r. 1517-56) virtually ignored the archipelago but Philip II (r. 1556-98) did take an interest—as the name of the country commemorates to this day. In 1564 Philip dispatched Miguel Lopez de Legazpi to pacify the islands and make them Christian. Legazpi won Manila from the Muslims in 1571 and then captured all of Luzon. Other islands fell in rapid succession and by 1600 most of the archipelago had submitted to Spain. The pagan inhabitants accepted Spanish dominion with little resistance; after the conquest, they quickly accepted the Spaniards’ language, religion, culture and institutions."
January 1, 1970
https://en.wikiquote.org/wiki/Islam_in_the_Philippines