Army of the Potomac (Confederate)
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The Confederate Army of the Potomac, whose name was short-lived, was the command under Brigadier General P.G.T. Beauregard. Its only major combat action was the First Battle of Bull Run. After Bull Run, the Army of the Shenandoah was merged into the Army of the Potomac with Gen. Joseph E. Johnston, the commander of the Shenandoah, taking command. The Army of the Potomac was renamed the Army of Northern Virginia on March 14, 1862, with Beauregard's original army becoming the Army of Northern Virginia's First Corps.