Dakota War of 1862: The largest mass-hanging in U.S. history takes place in Mankato, Minnesota, where 38 Native American prisoners are hanged.

The Dakota War of 1862, also known as the U.S.-Dakota War of 1862, 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 the Lower Sioux Agency and white settlements 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. Thirty-eight Dakota men were subsequently hanged for crimes committed during the conflict in the largest mass execution in US history.