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| Fort Halleck (1862-1866) - Established 20 Jul 1862 by Maj. John O'Ferrall, 11th Ohio Cavalry and named for Maj. Gen. Henry W. Halleck. Abandoned 4 Jul 1866 and transferred to the Interior Department 11 Oct 1886. |
| If you have any information on any historical fort’s in Wyoming or any military records from these old forts, or family stories about these forts and would like to share them with our viewers please email the Administrator for Wyoming Old Forts. |