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There are at least 60 current and former U.S. military installations located in Montana. Installations listed as historical are no longer in service and may have no physical remains in the state.

Current installations

Malmstrom AFB, Great Falls, MT, 2009

Historical installations

Fort Ellis, Bozeman, MT, 1871

These installations are classified as historical by the U.S. Board on Geographic Names: Historical Features – Features that no longer exist on the landscape or no longer serve the original purpose.

Further reading

  • Frazer, Robert W. (1965). Forts of the West-Military Forts and Presidios and Posts commonly called Forts West of the Mississippi River to 1898. Norman, Oklahoma: University of Oklahoma Press.
  • Hart, Herbert M. (1963). Old Forts of the Northwest. Seattle, Washington: Superior Publishing Company.
  • Grant, Bruce (1965), American Forts-Yesterday and Today, New York: E.P. Dutton and Co. Inc.