Dissatisfied with the peace treaty that ended the Spanish-American War, he headed a rebellion against U.S. occupying forces from 1899 until he was captured by in 1901. Aguinaldo took an oath of allegiance to the United States, was briefly imprisoned, and retired to private life. In 1935 he ran for president but was defeated by Manuel Quezon. Aguinaldo was charged with cooperating with the Japanese occupying the Philippines in World War II, but was not tried. With V. A. Pacis he wrote A Second Look at America (1957).
See biography by C. Quirino (1969).