What led to the insurrection between the Cheyenne and the U. S. Army?

The Cheyenne and Arapaho tribes came into conflict with the US government in 1864. This was sparked by the discovery of gold in the Colorado Territory in 1858. It caused lots of prospectors to trespass Cheyenne and Arapaho land.

Explanation:

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answer; /// the correct answer is evidence of the olmec civilization has been found in southern american in a hot steamy forest, archaeologists have found earthen artifacts at several sites that were evidence of the olmec civilization. these   artifacts were mounds,courtyards and pyramids build of stones, also on top of the mounds were many monuments made of stone, some of these stone structures are very large, they weigh as much as 44