Union Army Formations |
|---|
| 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, District of California, District of Southern California, District of Utah
- 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
| | 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
| | Military
Division of the
Mississippi |
- Cavalry Corps of the Military Division of the Mississippi
- Department of the Cumberland: District of the Etowah, District of Middle Tennessee, District of Northern Alabama, District of West Tennessee
- Department of the Ohio: District of East Tennessee, Department of Kentucky, District of Cairo, District of Western Kentucky
- Northern Department: District of Indiana, District of Illinois, District of Michigan
| | 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
| | | Union Armies |
Army of Arkansas ·
Army of the Border ·
Army of the Cumberland ·
Army of the Frontier ·
Army of Georgia ·
Army of the Gulf ·
Army of the James ·
Army of Kentucky ·
Army of the Mississippi ·
Army of the Ohio ·
Army of the Potomac ·
Army of the Shenandoah ·
Army of the Southwest ·
Army of the Tennessee ·
Army of Virginia ·
Army of West Mississippi ·
Army of West Virginia ·
| | | Union Army Corps |
I Corps ·
II Corps ·
III Corps ·
IV Corps ·
V Corps ·
VI Corps ·
VII Corps ·
VIII Corps ·
IX Corps ·
X Corps ·
XI Corps ·
XII Corps ·
XIII Corps ·
XIV Corps ·
XV Corps ·
XVI Corps ·
XVII Corps ·
XVIII Corps ·
XIX Corps ·
XX Corps ·
XXI Corps ·
XXII Corps ·
XXIII Corps ·
XXIV Corps ·
XXV Corps ·
Cavalry Corps ·
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