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Union Army Formations |
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Independent
Departments |
- Department of the East: District of Central New York, District of Massachusetts, District of Western New York
- Department of the Pacific: District of Arizona, District of Humboldt, District of Oregon (military), District of California, District of Southern California
- Department of the Potomac
- Department of the South: District of Florida, District of Hilton Head, District of North Carolina, District of Savannah, Northern District (Charleston)
- Department of Virginia and North Carolina: District of Eastern Virginia, District of North Carolina
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Middle
Military
Division |
- Middle Department: Department of Rappahannock, Department of Shenandoah, Mountain Department
- Department of Pennsylvania: Department of the Monongahela, Department of the Susquehanna
- Department of Washington: District of Alexandria, District of Saint Mary's, District of Washington
- Department of West Virginia: District of Harper's Ferry, Kanawha District
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Military
Division of the
Mississippi |
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Military
Division of
West
Mississippi |
- Department of Arkansas: District of Eastern Arkansas, District of the Frontier, District of Little Rock
- Department of the Gulf: District of Baton Rouge and Port Hudson, District of Carrollton, District of Key West and Tortugas, District of La Fourche, District of West Florida and South Alabama
- Department of Kansas: District of Colorado (military), District of Nebraska, District of North Kansas, District of South Kansas, District of Upper Arkansas
- Department of Missouri: District of Central Missouri, District of North Missouri, District of Rolla, District of Saint Louis, District of Southwest Missouri
- Department of New Mexico: District of Arizona
- Department of the Northwest: District of Iowa, District of Minnesota, District of Wisconsin
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| Union Armies |
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| Union Army Corps |
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