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).
Philippines Campaign (1941–1942)
The Philippines Campaign (Filipino: "Kampanya sa Pilipinas" or "Labanan sa Pilipinas") or the Battle of the Philippines, fought 8 December 1941 – 8 May 1942, was the invasion of the Philippines by Imperial Japan and the defense of the islands by United States and Filipino forces during the Second World War.