The defeat of
Little Crow in the
Dakota War of 1862 caused the widespread dispersion of the Santee Sioux or Eastern Dakota. More than 4,000 Santee and other Sioux congregated in the summer of 1863 in a large encampment in present-day
Kidder County, North Dakota. In June and July 1863,
Brigadier general Henry Hastings Sibley led a military expedition to punish the Santee. Sibley had 2,056 men – 1,436 infantry, 520 cavalry, and 100 artillery and white and Indian scouts. On July 24, Sibley found the Sioux camp and the
Battle of Big Mound ensued. The Sioux retired from the battlefield, the warriors fighting a rear guard action to protect their families for about 12 miles (20 km). As the families continued to flee toward safety across the
Missouri River, the warriors paused at Dead Buffalo Lake, about two miles (3 km) northwest of present-day
Dawson, North Dakota to await Sibley's advance. Many of the Santee under their leader Standing Buffalo had been reluctant fighters and appear to have avoided further conflict by fleeing northwest and eventually to Canada, rather than halt at Dead Buffalo Lake. The remaining Santee, Yankton, and Yanktonai whose best known leader was
Inkpaduta, were joined by about 650
Hunkpapa and
Blackfoot (Lakota) Teton warriors. This brought the number of Indian warriors up to 1,600, according to one estimate.
Sitting Bull was among the Teton reinforcements. ==Battle==