Spanish–Moro conflict
The Spanish initiated the conflict by conquering the Philippines and invading Moro territory in an effort to subjugate the region to their rule since the 1500s. When the Spanish conquered the Muslim Kingdom of Maynila, a vassal of the Sultanate of Brunei, the Islamic rajah, Rajah Sulayman resisted the Spanish. Manila then became the capital of the Spanish Philippines after the conquest, with the Spanish forcibly converting people to Catholicism. The Spanish–Moro Wars started with the Castille War, a war between Spaniards and the Sultanate of Brunei. (The term "Moro" at this time included Muslim Tagalogs who were ruled by the Sultanate of Brunei).
History of the Philippines
Around 1608 William Adams, an English navigator contacted the interim governor of the Philippines, Rodrigo de Vivero y Velasco on behalf of Tokugawa Ieyasu, who wished to establish direct trade contacts with New Spain. Friendly letters were exchanged, officially starting relations between Japan and New Spain. From 1565 to 1821, the Philippines was governed as a territory of the Viceroyalty of New Spain from Mexico, via the "Royal Audiencia" of Manila, and administered directly from Spain from 1821 after the Mexican revolution, until 1898.