As the war raged in the east, the white frontier exploded into its own nightmare of killing. The outbreaks had their origins in the north in 1862, with an Indian revolt on the prairie plains of Minnesota. That year the Santee Sioux (the eastern Sioux, also known as Dakota) rose up in rebellion from their reservation along the Minnesota River. They killed as many as eight hundred white settlers, the highest civilian wartime toll in U.S. history prior to 9/11. They made another forty thousand into refugees, who fled eastward in full mortal panic. The violence was extreme, almost mindless,
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