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The Louisiana Purchase transfers much of Wyoming to the U.S..
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John Colter arives in Wyoming
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Hunt led his men in the Green Valley.
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Thousands of families travel along the Oregon Trail, which cut across Wyoming. tt
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Wyoming becomes part of the Dakota Territory.
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Red Cloud led a combined force of Sioux, Cheyenne and Arapaho fighters.
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Union Pacific Railroad tracks are laid in Wyoming.
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The U.S. Army drives the Sioux out of Wyoming.
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Wyoming is the 44th state. Cheyenne is its capital.