The Philippine-American War was an armed military conflict between the United States and the First Philippine Republic, fought from 1899 to at least 1902, which arose from a Filipino political struggle against U.S. occupation of the Philippines. While the conflict was officially declared over on July 4, 1902, American troops continued hostilities against remnants of the Philippine Army and other resistance groups until 1913, and some historians consider these unofficial extensions part of the war.