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The Wright brothers had their first flight.
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The 16th amendment was ratified, this established Congress's right to impose a Federal income tax.
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Woodrow Wilson becomes the 28th president of the United States.
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The 17th amendment was ratified, this allowed voters to cast direct votes for U.S. Senators.
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WWI begins
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The RMS Lusitania was sunk
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The United States joins WWI with Great Britain, France and Russia as allies.
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The 18th amendment was ratified, this established the prohibition of "intoxicated liquors" in the U.S.
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The Treaty of Versailles was signed, bringing WWI to an end.
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The 19th amendment was ratified which granted women the right to vote.