The United States Army in the Eastern Theater

< to May • June 1863 • to July >

Commanded by Major General Henry Halleck

Army of the Potomac
Major General Joseph Hooker (to June 28)

Major General George Meade

Middle Department
Major General Robert Schenck

Department of Virginia
Major General John Dix

Department of Washington
Major General Samuel P. Heintzelman Department of the Susquehanna (1)
Major General Darius Couch

Department of West Virginia (2)
Brigadier General Benjamin F. Kelly

(1) Established June 9, consisting of the State of Pennsylvania east of Johnstown and Laurel Hill Mountain
(2) Established June 28, consisting of the new state of West Virginia and Maryland west of the Alleghenies