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California's name when it fought for independence from Mexico

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to add (the United States annexed both Texas and Hawaii)

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one of the most famous (and difficult) trails to the west

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a small mission where a group of Texan and American soldiers were killed by the Mexican army; became a rallying cry for the war "Remember the Alamo!"

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Texas as an independent country

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Shoshone guide who helped Lewis and Clark reach the Pacific Ocean on their expedition across the Louisiana Purchase

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mountain ridge that separates river systems flowing towards opposite sides of a continent

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with early cries of "54 40 or fight" it looked like the United States might have to fight Great Britain for control of Oregon; fortunately, they came to an agreement to set the U.S.'s northernmost border at 49 degrees north

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constructed to open up travel to the West

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explored the upper MIssissippi River and Arkansas River; also explored parts of Colorodo and New Mexico; Pike's Peak

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sent out by Thomas Jefferson to map the Louisiana territory and record their findings concerning flora, fauna, and native groups

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$15 million deal between the US (Jefferson) and France (Napoleon); resulted in doubling the size of the United States and giving the U.S. control of the Mississippi River and the port of New Orleans