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Why is the execution of 38 Dakota men in 1862 historically significant?

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A Cheyenne River Sioux dancer in colorful traditional regalia performs during the Grand Entry at a powwow, with an American flag and other participants in the background. — Oceti Sakowin A member of the Cheyenne River Sioux Tribe performing during the Grand Entry at the Cheyenne River Sioux Tribe Fair Rodeo and Powwow, Eagle Butte, South Dakota, September 4, 2016.

The execution of 38 Dakota men in Mankato on December 26, 1862, is historically significant primarily because it remains the single largest mass execution in United States history.12

Following the U.S.-Dakota War of 1862, nearly 400 Dakota men were subjected to military tribunals characterized by a lack of legal representation and proceedings conducted in a language foreign to the defendants. While 303 men were initially sentenced to death, President Abraham Lincoln reviewed the transcripts and commuted the sentences of most, leaving 39 to be executed; one of these individuals received a final reprieve, resulting in the hanging of 38 men.12

This event serves as a somber marker of the U.S. government's punitive response to the conflict, which was fueled by broken treaties, starvation, and the failure to provide promised annuities. The execution accelerated the forced removal of the Dakota from Minnesota and the subsequent voiding of their treaties, marking a devastating chapter in the history of the Oceti Sakowin people.12