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On this day, Congress approved the Northwest Ordinance, creating new laws and restrictions for Northwestern Territory.
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Thomas Jefferson completed the Louisiana Purchase on this day. The U.S. was said to be doubled in size after the purchase of land.
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The Missouri Compromise had been confirmed on this day, making Missouri a slave state and Maine a free state.
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On this day, Texas became the 28th state in the Union.
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On this day, America declared war on Mexico,
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In Mexico City, America and Mexico signed a treaty ending the war.
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On this day, California joined the nation as a free state.
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A war in Kansas over slavery that lasted several years began in 1854
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A battle between the white settlers and Native American tribes began on this day, after companies and settlers rushed to mine in the tribes' area.
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During this year, the Populist Party submitted a candidate for their party for the presidential election. After he lost the election, the Populist Party joined the Democrats.