On September 19, 1862, Col. Henry Hastings Sibley set out from Fort Ridgely with 1,500 volunteers to put down the Santee uprising. As they neared Wood Lake on September 23, Sibley's men escaped an ambush by 700 warriors under Chief Little Crow and engaged them in a battle. Sibley's force won the day inflicting heavy casualties on the Sioux. For this action, Sibley received a promotion to brigadier general. Wood Lake was the first decisive defeat of the Sioux since the uprising began.