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Lewis and Clark were sent out to explore the west.
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The war which allowed the Americans to expand west; Also known as the second revolutionary war.
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Congress passed a law making all north territory, including Maine, were now free states while all south territory, including Missori, were now slave states creating an equal divide.
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The Americans sent the Natives away to reservations so they can expand west. 1 of 4 Natives were killed specifically on the actual trail.
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The Oregon Trail was started in Indepedence, Missouri.
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America went to war with Mexico over territory they saw fit as their own.
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The large mass of people who moved west to California to find gold.
