The Pawnee had a long tradition of living in present-day Nebraska. The Pawnee had been the most populous and perhaps the most powerful tribe in the Nebraska area, with a population of 10,000 to 12,000 around the year 1800. However, smallpox epidemics and increasing Sioux raids on villages beginning in the early 1800s and worsening in the 1830s left the Pawnee in a vulnerable position. In a 1833 treaty with the United States, the Pawnee ceded all of their land south of the
Platte River, a vast territory between the
Loup, Platte and
Republican rivers in
Nebraska and south into northern
Kansas. According to the terms of the 1833 treaty, this land was to remain a "common hunting ground" for the Pawnee and other "friendly Indians," meaning that the Pawnee had non-exclusive treaty rights to hunt buffalo in their former territory. The Massacre Canyon battlefield near Republican River is located within this area. They had suffered continual attacks by the
Sioux that increased violently in the early 1840s. No explicit mention is made of the "common hunting ground" established from previously-ceded Pawnee lands as established in the 1833 treaty. These actions by the Pawnee scouts did not improve relations between the Pawnee and Sioux. In 1868 the Sioux entered into a
treaty with the United States and agreed to live in the
Great Sioux Reservation in present-day
South Dakota. By Article 11 they received a right to hunt along the Republican River, in the same area that the Pawnee retained non-exclusive hunting rights to, almost 200 miles south of their new reservation. Because both tribes had signed treaties explicitly giving power of mediation to the United States government, there was an attempted peace negotiation in 1871 with the United States as intermediary which ultimately failed. In July 1873, a month before the massacre, the Oglala Sioux had been stopped from attacking the
Utes in retaliation for stolen horses and the killing of a Sioux man by Antoine Janis, the sub-agent for the band. ==Lead-up to the battle==