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In page 1921:

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  • October 20 – Treaty of Ankara signed between the French Third Republic and the Government of the Grand National Assembly of Turkey, ending the Franco-Turkish War.[4]
  • October 21 – George Melford's wildly successful silent film The Sheik, which will propel its leading actor Rudolph Valentino to international stardom, premieres in Los Angeles.[citation needed]
  • October 24 – In the continuing Rif War, the Spanish Army defeats rifkabyl rebels in Morocco.[citation needed]