Army of the Potomac
Major General George McClellan
Pope's beaten Army of Virginia withdrew into the defenses of Washington and was merged with the Army of the Potomac under McClellan's command. Pope requested to be relieved on September 3 and was transferred to Minnesota.
Dept. of Virginia
Major General John Dix
An area 60 miles around Fortress Monroe
Major General John E. Wool
New Jersey, Pennsylvania, Delaware, the eastern part of Maryland and the Eastern Shore of Virginia.
Military District of Washington
Brigadier General James S. Wadsworth
District abolished 9/2
Washington D.C. Defenses
Major General Nathaniel Banks (est. 9/7)
District of Columbia, Arlington County in Virginia, and adjacent fortifications