The Civil War, of course, took up a lot of
government resources. Because of this, Native Americans in the Midwest
weren't paid the way the treaties said they had to be. This led to
conflicts between the US and the Indians, including a famous incident in
Minnesota that ended with about 40 Sioux being hanged. It was also
during the Civil War that the infamous Sand Creek Massacre happened. There were also Indians who fought in the
Civil War, mainly on the side of the South. But this had little effect
other than on the individuals who fought. Mainly, then, the Civil War helped cause
conflicts to erupt because the US Government didn't have the resources
to either keep the Indians happy or keep them suppressed.
