The remaining convicted Indians stayed in prison that winter. The following spring they were transferred to Rock Island, Illinois, where they were held in prison for almost four years. By the time of their release, one third of the prisoners had died of disease. The survivors were sent with their families to Nebraska. Their families had already had been expelled from Minnesota.
During this time, more than 1600 Dakota women, children and old men were held in an internment camp on Pike Island, near Fort Snelling, Minnesota. Living conditions and sanitation were poor, and infectious disease struck the camp, killing more than three hundred. In April 1863 the U.S. Congress abolished the reservation, declared all previous treaties with the Dakota null and void, and undertook proceedings to expel the Dakota people entirely from Minnesota. To this end, a bounty of $25 per scalp was placed on any Dakota found free within the boundaries of the state. The only exception to this legislation applied to 208 Mdewakanton, who remained neutral or assisted white settlers in the conflict.
In May 1863 Dakota survivors were forced aboard steamboats and relocated to the Crow Creek Reservation, in the southeastern Dakota Territory, a place stricken by drought at the time. Many of the survivors of Crow Creek moved three years later to the Niobrara Reservation in Nebraska.