When did the Sioux tribe end?

The various tribes of the Midwestern and Great Plains areas, like the eastern sea board tribes, did not die out, but were forcibly moved under duress out into the badlands of America (New Mexico, Nevada, Utah, Arizona, etc) and onto small "reservations". Any of the Native American tribes which opposed this forced relocation were subsequently met with violence or incarceration. Many of the tribes which survived the relocation have decendents who live on these "reservations" to this day. The reason for these relocations was purely ethnically motivated as racial discrimination was previlant in the early days of American history. In fact, the Native Americans did not even receive citizenship status until 1924 and the ratification of the 14th Amendment.