Fort Henry on the Missouri River

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Fort Henry on the Missouri River, located at the mouth of the Yellowstone where it enters the Missouri, was established on October 1, 1822 by a party of men led by Major Andrew Henry, who mounted the expedition for the purpose of establishing a fur trade outpost for an area which now encompasses most of Montana, western North Dakota, parts of Wyoming, into Canada.[1][2] The site of the fort, which was abandoned in 1823, is approximately 20 miles (32 km) southwest of Williston, North Dakota near the Montana - North Dakota state line.

Other short-lived forts were established by Henry on his earlier expedition with the Missouri Fur Company. In the spring of 1810, the first Fort Henry[3] was built at the Three Forks of the Missouri River near-present day Three Forks, Montana, but was abandoned shortly thereafter.[4] A second Fort Henry[5] was established during the fall of 1810 on Henry's Fork of the Snake River in present-day southeastern Idaho; it was abandoned in 1811.[6]


  1. ^ Brown, Mark H. (1969). The Plainsmen of the Yellowstone: A History of the Yellowstone Basin. Lincoln, Neb.: University of Nebraska Press. p. 64. 
  2. ^ National Park Service (2011). "Andrew Henry". Retrieved 6 August 2011. 
  3. ^ Fort Wiki: Fort Henry (1)
  4. ^ W. Raymond Wood. First Post in the Far West: (November 1807 – March 1813). Discovering Lewis & Clark. (See Figure 6)
  5. ^ Fort Wiki: Fort Henry (2)
  6. ^ Lohse, E. S. (1993). "Southeastern Idaho Native American Prehistory and History". Manual for Archaeological Analysis: Field and Laboratory Analysis Procedures. Department of Anthropology Miscellaneous Paper No. 92-1 (revised). Pocatello: Idaho Museum of Natural History.