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  The United States purchased Alaska from Russia on March 30, 1867 for 7.2 million dollars.
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  The Transcontinental Railroad is a network of railroad tracks that crosses the continental United States.
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  The Chinese Exclusion Act prohibited the Chinese to immigrate to the United States.
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  The Sherman Antitrust Act banned monopolies
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  Ellis Island was a key spot for European immigrants when they came to the United States.
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  The result of Plessy v Ferguson resulted in the Supreme Court ruling with racial segregation in public places.
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  The Tenement Act was one of the first laws to prohibit the construction of tenement buildings.
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  The triangle shirtwaist fire is significant because it forced laws into place that required workplaces have fire escapes.
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  The 18 amendment prohibited the sale and possession of alcohol
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  The 19th amendment to the Constitution allowed women the right to vote