Camp McClellan is a former Union Army camp in the U.S. state of Iowa that was established in Davenport in August 1861 after the outbreak of the American Civil War. The camp was the training grounds for recruits and a hospital for the wounded. In 1863 it became a prison camp called Camp Kearney for members of the Sioux, or Dakota, tribe that were involved in raids in Minnesota. The camp was decommissioned after the release of the prisoners in 1866.

The Dakota War of 1862, also known as the Sioux Uprising, the Dakota Uprising, the Sioux Outbreak of 1862, the Dakota Conflict, or Little Crow's War, was an armed conflict between the United States and several eastern bands of Dakota collectively known as the Santee Sioux. It began on August 18, 1862, when the Dakota, who were facing starvation and displacement, attacked white settlements at the Lower Sioux Agency along the Minnesota River valley in southwest Minnesota. The war lasted for five weeks and resulted in the deaths of hundreds of settlers and the displacement of thousands more. In the aftermath, the Dakota people were exiled from their homelands, forcibly sent to reservations in the Dakotas and Nebraska, and the State of Minnesota confiscated and sold all their remaining land in the state. The war also ended with the largest mass execution in United States history with the hanging of 38 Dakota men.