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Feb 26, 1540
The first Europeans to venture into Colorado, the Spanish
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Explorer La Salle appropriates for France all of the area now known as Colorado east of the Rocky Mountains
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Juan Maria Rivera leads Spanish expedition into San Juan and Sangre de Cristo Mountains in search of gold and silver
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Spain ceded a vast area, including Colorado, to Napoleon Bonaparte and the French
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Colorado sold by Napoleon the United States as the "Louisiana Purchase"
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William Green Russell, a Georgia miner, discovers several hundred dollars worth of gold at the mouth of Dry Creek in the present-day Denver suburb of Englewood
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Congress votes statehood for Colorado
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Denver and Pacific Railroad is constructed to connect Denver with Union Pacific at Cheyenne, Wyoming