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United States payed $15 million to receive the territory which extends west from the Mississippi River to the Rocky Mountains.
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Robert Fulton builds the first commercial steamboat.
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U.S. declared war on Britain over Britian's interference and prevetion of American shipping to Europe and over their interference of America's westward expansion.
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Mexican War took place due to America's effort to gain territory in Southwest and California.
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On March 4, 1861 Abraham Lincoln was inaugurated as the 16th President of the United States.
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he Civil War was the conflict between the Union (the north) and the Confederacy (the south) over the expansion of slavery into western states and over the preservation of the Union.
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The North beats the South at the Battle of Palmito Ranch resulting in the south surrendering.
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Abraham Lincoln is Assassinated by William Booth.