Persecution of Muslims
The Philippines is predominantly a Christian society with a complicated history of relations between Islam and Christianity. Despite historic evidence of Islamization spreading throughout the islands in the 13th–16th centuries, the archipelago came under Spanish rule in the 16th century. The Spanish proselytized many natives, and labelled those who remained Muslims as "Moro", a derogatory term recalling the Moors, an Islamic people of North Africa who occupied parts of Spain for several centuries. Today, this term "Moro" is used to refer to the indigenous Muslim tribes and ethnic groups of the country. When the Spanish came to the Philippine islands, most of the natives in Luzon and Visayas were pagans with Muslim minorities, and while Spanish proselytized many natives, many Muslims in Luzon and Visayas were not exempted by the Spaniards from the Spanish Inquisition, wherein Muslims to become Catholics or die for their faith. Those who remained Muslims are only the natives of Mindanao and Sulu which the Spaniards did not invade or had control of only briefly and partially.
Sovereignty of the Philippines
On April 27, 1565, Spanish Conquistadores attacked the defiant Rajah Tupas, who had succeeded Rajah Humabon as king of Cebu. Tupas was defeated and made to sign an agreement after his defeat, effectively placing the Philippines under Spain. On February 8, 1597, King Philip II, near the end of his 42-year reign, issued a Royal Cedula instructing to Francisco de Tello de Guzmán, then Governor-General of the Philippines in severe terms to fulfill the laws of tributes and to provide for restitution of ill-gotten taxes imposed on the natives. The Cedula also decreed an undertaking by which the natives (referred to as "Indians"), "... freely render to me submission." The decree was published in Manila on August 5, 1598. King Philip died on 13 September, just forty days after the publication of the decree, but his death was not known in the Philippines until middle of 1599, by which time a referendum by which the natives would acknowledge Spanish rule was underway. With the completion of the Philippine referendum of 1599, Spain could be said to have established legitimate sovereignty over the Philippines.