1900 - 1920 By hectord2022 Nov 17, 1903 Acquisition of Panama Canal Zone Dec 17, 1903 Invention of First Airplane Mar 4, 1905 Second Inauguration of Theodore Roosevelt Apr 18, 1906 The San Francisco Earthquake Mar 4, 1909 Inauguration of William Howard Taft Mar 4, 1913 Inauguration of Woodrow Wilson Period: Jul 28, 1914 to Nov 18, 1918 World War I (The Great War) May 7, 1915 Sinking of the RMS Lusitania Apr 6, 1917 Declaration of War against Germany (WWI) 1918 Spanish Influenza Reaches the United States Nov 11, 1918 Armistice Day (End of WWI)