The Battle of Stony Lake was the third and last engagement of Henry Hastings Sibley's 1863 campaign against the Santee, Yankton, Yanktonai and Teton Sioux in Dakota Territory.

Following the battle, the Indians fought delaying actions against Sibley until their women and children had successfully crossed the Missouri River.

Sibley anticipated that he might trap the Indians between his forces and those of General Alfred Sully, who was ascending the Missouri River with 1,200 soldiers.

Colonel James H. Baker's 10th Minnesota Regiment was in Sibley's van and advanced, firing volleys and supported by two mountain howitzers.

The next morning, July 29, Sibley sent two howitzers and his mounted Rangers forward about 12 miles to attempt to prevent the Sioux from crossing the Missouri River.

Sibley camped near the river and the next three nights was subjected to constant, small-scale attacks by the Sioux who burned the prairie, fired into the army's tents, and stampeded some livestock.

With Sully, supplies, and reinforcements nowhere to be found, Sibley decided on July 31 to abandon the operation and march back to Minnesota.

[7] Sibley proclaimed his expedition a success as he had pushed the Sioux westward across the Missouri River, far from the settlements in Minnesota and eastern Dakota territory.