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Thomas Jefferson pays $15 million dollars for the Midwest-area territory in North America
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Lewis and Clark set off to explore the Louisiana Purchase territory
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US declares war on Britain because of their interference in the US plan to expand westward
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British forces invaded Washington DC and captured the city, then burned many federal buildings during the War of 1812
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Construction began on the Baltimore/Ohio railroad, making it easier to trade and expanded the idea of western expansion
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This war was fought for the US to gain California and other western states
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Gold is found in California and thousands of Americans migrate west, expanding manifest destiny
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America bought a small plot of land below current-day Arizona and New Mexico from Mexicio for $10 million
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Abraham Lincoln is elected as 16th president of the USA
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This war was between the Confederate and Union states over the expansion of slavery into western states