Political map of East Asia and the Western Pacific 03 June 1899 (Philippine-American War): Philippine nationalists (Philippine Revolution) had helped the United States in its 1898 war with Spain (Spanish-American War). However, when the Americans won that war, they proceeded to replace the Spanish as the colonial rulers of the Philippines. In response, the nationalists proclaimed a Philippine Republic (First Philippine Republic), fighting an unsuccessful 3-year war for their independence (Phillippine-American War).