Confederate Armies & Departments in the Eastern Theater
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The Confederate Army of the Shenandoah was organized on June 17, 1861 at Winchester, Virginia.
The Confederate Army the Potomac was organized on June 20, 1861, from all operational forces in northern Virginia, under the command of General P.G.T. Beuregard.
The Army of the Peninsula under the command of Colonel John Magruder defended the eastern approaches to Richmond.