1900-1920 By corbinfowler 1901 Theodore Roosevelt becomes president 1904 Roosevelt Corollary to Monroe Doctrine Period: 1904 to 1914 Panama Canal built 1906 Pure Food and Drug Ac 1912 Election of Woodrow Wilson Period: 1914 to 1918 World War 1 1915 The sinking of the Lusitania 1917 U.S. enters World War 1 1918 The Treaty of Versailles 1920 19th Amendment