The Philippine Revolution began in 1896 as an armed conflict between the Philippine people and Spanish colonial authorities. It was led by the Katipunan, a liberation movement headed by Andres Bonifacio that sought independence from Spain. Emilio Aguinaldo emerged as a key leader of the revolution. While the revolution was ongoing, the U.S. defeated Spain in the Spanish-American War in 1898. This led to Spain ceding the Philippines to the U.S. in the Treaty of Paris. However, conflict then broke out between Filipino revolutionaries and U.S. forces, launching the Philippine-American War.