"The Monkeys Have No Tails in Zamboanga" is a song that probably originates from the Spanish-American War (1898) or the Moro Rebellion (1899-1913), a conflict in the Philippines between Muslim Filipino revolutionary groups and the United States military. The song was particularly popular amongst United States soldiers in the Pacific during World War II and is the official regimental march of the 27th United States Infantry Regiment (rewritten as the "Wolfhound March"). The lyrics mention locations in the Philippines and mocks the country's plants, animals and people, and there has been some speculation that the 'monkeys with no tails' of the title was an offensive description of the Filipino people. Zamboanga is the 6th most populous city in the Phillipines and the name of a early 20th century province that contained it. Recorded versions include those by Abe Lyman (1939) and Harry McClintock (1950) and the song features in films including John Ford's They Were Expendable (1945) and Donovan's Reef (1963) and Frank Capra's A Hole In The Head (1959).