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A treaty was signed that said the U.S. will have the Louisiana Territory.
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Colorado becomes part of the Union.
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The army kills Native Americans at sand creek.
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Colorado's statehood finally arrives!!!!!!!!!
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Colorado grants women the right to vote on local laws.
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World War I increases the amount of molybendenum needed. Molybedenum is mined in Colorado.
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Tourists start to come to Colorado to ski.
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Columbine School massacre occurs.
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Colorado state legislature passes a bill affecting undocumented immigrants in Colorado.