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Rene-Robert Cavelier claims Louisiana territory including part of Colorado and and claim it for Spain
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Juan de Ulibarri and his soldiers arrive in Colorado and cliam it for SPain
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Part of Present day Colorado is included in the Louisiana Purchise
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Zepulan Pike explores Colorado, and sees, but does not climb, the peak that will be named after him
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Stephen Long leads an expedition through the Colorado region
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The United States given control of southern Colorado through Treaty of Gaudalupe Hidalgo, wich ends the Mexican war
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First peranmanent U.S settlement in Colorado established at San Luis
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U.S Congress creates Colorado Territory
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Oil is discovered in Colorado, near Florence
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Third Colorado Caviary attacks sleeping Aropho and Cheynne at Sand Creek, killing several hundred men, and women, and children
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Colorado Wins Statehood
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Denver Brocos Win FIrst Super Bowl