Mexican Revolution By Samuel Silva Torres Nov 20, 1910 Francisco Madero Declares Armed Insurrection 1911 Madero Becomes President May 21, 1911 Porfirio Diaz Leaves for Europe 1913 General Victoriano Huerta Becomes President Apr 22, 1914 U.S. Troops Occupied Veracruz Aug 20, 1914 Venustiano Carranza Becomes Presindent Mar 9, 1916 Pancho Villa Attacks Columbus, Nuevo México Mar 15, 1916 General Pershing Attacks Mexico 1917 Zimmerman Telegraph Feb 5, 1917 Constitution 1917 Aproved 1920 Obregon Overthrows Carranza