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.
Spanish Empire
With the conquest and settlement of the Philippines, the Spanish Empire reached its greatest extent. In 1564, Miguel López de Legazpi was commissioned by the viceroy of New Spain (Mexico), Don Luis de Velasco, to lead an expedition in the Pacific Ocean to find the Spice Islands, where earlier explorers Ferdinand Magellan and Ruy López de Villalobos had landed in 1521 and 1543, respectively. The westward sailing to reach the sources of spices continued to be a necessity with the still Ottomans controlling major choke points in central Asia. It was unclear how the agreement between Spain and Portugal dividing the Atlantic world affected finds on the other side of the Pacific. Spain had ceded its rights to the "Spice Islands" to Portugal in the Treaty of Saragossa in 1529, but the appellation was vague as was their exact delineation. The Legazpi expedition was ordered by King Philip II, after whom the Philippines had earlier been named by Ruy López de Villalobos, when Philip was heir to the throne. The king stated that "the main purpose of this expediiton is to establish the return route from the western isles, since it is already known that the route to them is fairly short." The viceroy died in July 1564, but the Audiencia and López de Legazpi completed the preparations for the expedition. On embarking on the expedition, Spain lacked maps or information to guide the king's decision to authorize the expedition. That realization subsequently led to the creation of reports from the various regions of the empire, the relaciones geográficas. The Philippines came under the jurisdiction of the viceroyalty of Mexico, and once the Manila Galleon sailings between Manila and Acapulco were established, Mexico became the Philippines' link to the larger Spanish Empire.