The steamboat traveling up the Missouri River to Fort Union from St. Louis docked at Fort Clark near several Mandan villages on June 18,1837, here the disease spread to the Mandan people S.S. St. Peter's & the 1837 Small Pox Epidemic.
The steamboat traveling up the Missouri River to Fort Union from St. Louis here the disease spread to the Mandan people S.S. St. Peter's & the 1837 Small Pox Epidemic. This St. Louis was docked at Fort Clark near several Mandan villages on June 18,1837.