University of Missouri
Famous Trials: Chronology of the Dakota Conflict (Sioux Uprising) Trial
Contains a chart of the chronology of the Dakota Conflict trials from 1851 to 1890.
Curated OER
Wikipedia: National Historic Landmarks in Minnesota: Pipestone National Monument
Pipestone National Monument preserves traditional catlinite quarries just north of Pipestone, Minnesota. The catlinite, or "pipestone", was and is used to make peace pipes, vitally important to traditional Plains Indian culture. The...