page_title: Timeline of United States history (1900–1929)
section_title: Presidency of Theodore Roosevelt
hierarchical_section_title: Timeline of United States history (1900–1929) / 1900s / Presidency of Theodore Roosevelt
caption_attribution_description: English: Theodore Roosevelt, former President of the United States.
context_page_description: This section of the Timeline of United States history concerns events from 1900 to 1929.
context_section_description: 1901 – President McKinley assassinated, Vice President Roosevelt becomes the 26th President
  1901 – U.S. Steel founded by John Pierpont Morgan
  1901 – Hay-Pauncefote Treaty
  1901 – Walt Disney born
  1902 – Drago Doctrine
  1902 – First Rose Bowl game played
  1902 – Newlands Reclamation Act
  1903 – Great Train Robbery movie opens
  1903 – Harley-Davidson Motor Company created
  1903 – Ford Motor Company formed
  1903 – First World Series
  1903 – Elkins Act
  1903 – Big Stick Diplomacy
  1903 – Hay-Bunau-Varilla Treaty
  1903 – Hay-Herrán Treaty
  1903 – Department of Commerce and Labor created
  1903 – The Wright brothers make their first powered flight in the Wright Flyer at Kitty Hawk, North Carolina
  1904 – Roosevelt Corollary to Monroe Doctrine
  1904 – Panama Canal Zone acquired
  1904 – World's Fair St. Louis
  1904 – U.S. presidential election, 1904: Theodore Roosevelt elected president for full term; Charles W. Fairbanks elected vice president
  1905 – President Roosevelt begins full term, Charles W. Fairbanks becomes Vice President
  1905 – Niagara Falls conference
  1905 – Industrial Workers of the World
  1905 – Albert Einstein publishes his Theory of Relativity
  1906 – Susan B. Anthony dies
  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
  1906 – San Francisco earthquake
  1907 – Oklahoma becomes a state
  1907 – Gentlemen's Agreement
  1907 – Coal mine explodes in Monongah, West Virginia, killing at least 361. Worst industrial accident in American history.
  1908 – Ford Model T appears on market
  1908 – Root-Takahira Agreement
  1908 – Federal Bureau of Investigation established
  1908 – Aldrich-Vreeland Act
  1908 – U.S. presidential election, 1908: William Howard Taft elected president; James S. Sherman vice president. William Jennings Bryan loses for the third and final time.
  1909 – The U.S. penny is changed to the Abraham Lincoln design
caption: Teddy Roosevelt, the Bull Moose, led American progressives in the early 20th century
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