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Theodore Roosevelt is elected as the 26th United States president at age 43.
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President Theodore Roosevelt oversaw the long term U.S. goal of an isthmian canal.
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The Hepburn Act of 1906 granted the Interstate Commerce Commission the power to set maximum railroad rates and extend its jurisdiction.
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World War I began in 1914 after the assassination of Austrian archduke Franz Ferdinand and his wife.
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D.W. Griffith's controversial 1915 film about the Civil War and Reconstruction portrayed the Ku Klux Klan as saviors. The film helped rekindle the KKK.
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Germany agreed to give a warning before sinking merchant and passenger ships to provide safely for crew and passengers.
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White women are allowed to vote in the passing of the 19th amendment.
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The most important treaty that required Germany to disarm and pay reparations to countries that had formed the Entente powers.