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Ancient Puebloans build a cliff city at Mesa Verde.
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Bent's For serves as a trading post in Colorado; Mexican settlers receive land grants in Colorado.
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Gold is found along the South Platte RIver.
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Railroad reach Colorado.
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Colorado becomes a state.
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World War I increases the demand for molybodenum, mined in Colorado.
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World War I increases the demand for molybdenum mined in Colorado.
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Colorado's population reaches more than one million people.
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The federal government establishes a Japanese American internment camp named Amache
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Tourism industry flourishes and the ski industry begins
