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The expansion of the marketplace, helped make new roads and canals to connect communities.
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The United States used the Santa Fe Trail as an invasion route to Mexico.
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It Caused the Civil War because the anti-immigration put a threat on the economic and political side of native born americans.
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Thousands of slaves escaped from the feilds and went to the underground railroad and went to states that were free.
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Opposed slavery in territories.
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An effort to defuse the political rivalries. The United States divided evenly, slave and free.
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The California Gold Rush brought 300,000 people to the rest of the United States.
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Bleeding Kansas was the violent outbreak involving anti-slavery and pro- slavery.
