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The 15th Amendment to the Constitution granted African American men the right to vote.
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First opened in Philadelphia
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The first World War began as a local war between Austria-Hungary and Serbia in 1914
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The cause of America's entry into WWI in April 1917 was the German announcement of unrestricted submarine warfare, and the subsequent sinking of ships with Americans on board (the Lusetania)
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prohibition of alcohol
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also known as the Great Depression (Black Tuesday), was the most devastating stock market crash in the history of the United States
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the ban on alcohol is removed
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first computer
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