The Negros Revolution, commemorated and popularly known as the Fifth of November or Negros Day was a political movement in the Philippines that established a government on Negros Island in 1898, during the Spanish-American War, ending Spanish control of the island and paving the way for a republican government run by the Negrense natives. The newly established Negros Republic lasted for approximately three months. American forces landed unopposed on the island on February 2, 1899, ending the island's independence. Negros was then annexed to the Philippine Islands on 20 April 1901.