World History Maps Interactive Historical Atlas of the Civil War, detail page for:

The Rappahannock, US Army Department Apr 4, 1862 - May 14, 1862

US Dept. of The Rappahannock created including parts of Maryland and Virginia, Apr 4, 1862
Irvin McDowell Commander, Apr 4, 1862 - Jun 26, 1862
US Dept. of the Rappahannock discontinued divided between Middle Dept. and Dept. of the Potomac, Jun 26, 1862