1900s 1900 - US population exceeds 75 million 1900 - Foraker Act 1900 - Gold Standard Act 1900 - US helps put down Boxer Rebellion in China 1901 - William McKinley assassinated 1901 - Theodore Roosevelt becomes President 1901 - US Steel founded by John Pierpont Morgan 1901 - Platt Amendment 1901 - Hay-Pauncefote Treaty 1902 - Drago Doctrine 1902 - First Rose Bowl game played 1902 - Newlands Reclamation Act 1903 - Great Train Robbery opens 1903 - Ford Motor Company formed 1903 - First World Series 1903 - Elkins Act 1903 - Big Stick Diplomacy 1903 - Hay-Bunau Varilla Treaty 1903 - Hay-Herran Treaty 1903 - Department of Commerce and Labor created 1904 - Roosevelt Corollary to Monroe Doctrine 1904 - Panama Canal Zone acquired 1905 - Niagara Falls conference 1905 - Industrial Workers of the World (IWW) formed 1906 - Algeciras Conference 1906 - Pure Food and Drug Act and Meat Inspection Act 1906 - Hepburn Act 1906 - Theodore Roosevelt negotiates Treaty of Portsmouth, receives Nobel Peace Prize 1907 - Gentleman's Agreement 1907 - Oklahoma becomes a state 1907 - Panic of 1907 1908 - Ford Model T appears on market 1908 - Root-Takahira agreement 1908 - Federal Bureau of Investigation established 1908 - Aldrich Vreeland Act 1909 - United States one cent coin is changed to Abraham Lincoln design 1909 - William Howard Taft becomes President 1909 - Robert Peary plants American flag at North Pole 1909 - NAACP founded by W. E. B. DuBois 1909 - Payne-Aldrich tariff 1909 - Taft implements Dollar Diplomacy 1909 - Ballinger-Pinchot controversy 1910s 1910 - Boy Scouts of America chartered 1910 - Mann-Elkins Act 1910 - Mann Act 1911 - Supreme Court breaks up Standard Oil 1912 - Titanic sinks 1912 - New Mexico and Arizona become states 1913 - Woodrow Wilson becomes President 1913 - Federal Reserve Act 1913 - 16th Amendment 1913 - 17th Amendment 1913 - Underwood tariff 1914 - Mother's Day created 1914 - Federal Trade Commission created 1914 - Clayton Antitrust Act 1914 - ABC Powers 1915 - The Birth of a Nation opens 1915 - RMS Lusitania sunk 1916 - US acquires Virgin Islands 1916 - Jeanette Rankin elected 1916 - Louis Brandeis appointed to Supreme Court 1916 - Adamson Railway Labor Act 1916 - Federal Farm Loan Act 1917 - Zimmerman telegram 1917 - US enters World War I 1917 - Espionage and Sedition Acts 1917 - Lansing-Ishii Agreement 1918 - President Wilson's Fourteen Points 1918 - Treaty of Versailles ends World War I 1919 - Senate rejects Treaty of Versailles and League of Nations 1919 - 18th Amendment 1920s 1920 - 19th Amendment 1920 - US Population tops 100 million 1920 - Sacco and Vanzetti arrested 1920 - First radio broadcast in Pittsburgh, Pennsylvania 1920 - Volstead Act 1920 - Esch Cummins Act 1921 - Warren G. Harding becomes President 1921 - Washington Disarmament Conference 1921 - Emergency Quota Act 1922 - Fordney McCumber tariff 1923 - Warren G. Harding dies 1923 - Calvin Coolidge becomes President 1923 - Yankee Stadium opens 1923 - Teapot Dome Scandal 1924 - Immigration Act Basic Law 1924 - Indian Reorganization Act 1925 - Scopes trial 1925 - Nellie Tayloe Ross elected 1927 - Sacco and Vanzetti executed 1927 - Charles Lindbergh makes first trans-Atlantic flight 1927 - The Jazz Singer, the first "talkie" (motion picture with sound) is released 1928 - Steamboat Willie opens 1928 - Kellogg-Briand Pact 1929 - Herbert Hoover becomes President 1929 - Saint Valentine's Day Massacre 1929 - Immigration Act 1929 - Great Depression begins 1860-1899 1900-1929 History of the United States 1930-1949
