More than one-quarter of the Dakota people who surrendered in 1862 died during the following year. After their exile from Minnesota, the Dakota faced concentration onto reservations, pressure to assimilate, and opening of reservation land for white settlement.
Dakota communities outside Minnesota were concentrated in several major areas: reservations created at Santee, Nebraska (1869); Sisseton and Devil’s Lake, North Dakota (established by treaty in 1867); as well as reserves in Manitoba and Saskatchewan (throughout the 1870s). A small group of families left the reservation at Santee and formed a community in the Big Sioux river valley in Flandreau, South Dakota, in 1869. Another group left the Sisseton Reservation and settled at Brown Earth, South Dakota, in 1874. A reservation established in 1866 at Fort Peck, Montana, also drew exiles from Minnesota.
A small number of Dakota people remained in Minnesota after the war. In the 1880s, more began to return from exile. Several families purchased land that eventually became the Lower Sioux community. In 1887 some Sissetons settled near Granite Falls; in 1910 they were joined by some Mdewakantons and Yanktons, forming the basis for today’s Upper Sioux community. Other communities eventually developed at Prairie Island and Shakopee.
Letter From Gen. John Pope to Henry Sibley, September 28, 1862:
"The horrible massacres of women and children and the outrageous abuse of female prisoners, still alive, call for punishment beyond human power to inflict. There will be no peace in this region by virtue of treaties and Indian faith. It is my purpose utterly to exterminate the Sioux if I have the power to do so and even if it requires a campaign lasting the whole of next year. Destroy everything belonging to them and force them out to the plains, unless, as I suggest, you can capture them. They are to be treated as maniacs or wild beasts, and by no means as people with whom treaties or compromises can be made."