Army of the Potomac 
Major General Joseph Hooker (until 6/28)
Major General George G. Meade (after 6/28)
Dept. of Virginia 
Major General John Dix
An area 60 miles around Fortress Monroe
Middle Department 
Major General Robert Schenck
New Jersey, Pennsylvania, Delaware, the eastern part of Maryland and the Eastern Shore of Virginia.
Dept. of Washington 
Major General Samuel P. Heintzelman
District of Columbia, Arlington County in Virginia, and adjacent fortifications
Dept. of the Susquehanna (est. 6/9) 
Major Genral Darius Couch
The State of Pennsylvania east of Johnstown and Laurel Hill Mountain
Dept. of West Virginia (est. 6/28) 
Brigadier General Benjamin F. Kelly
West Virginia and Maryland west of the Alleghenies
West Virginia became a state on 6/20
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