Army of Northern Virginia 20 and July 21, the Army of the Shenandoah and forces from the District of Harpers Ferry were added. Units from the Army of the Northwest were merged into the Army of the Potomac between March 14 and May 17, 1862. The Army of the Potomac was renamed "Army of Northern Virginia" on March 14. The Army of the Peninsula was merged into it on April 12, 1862. Robert E. Lee's biographer, Douglas S. Freeman, asserts that the army received its final name from Lee when he issued orders assuming command on June 1, 1862. However, Freeman does admit that
Army of Northern Virginia The Department comprised three districts: Aquia District, Potomac District, and the Valley District. In April 1862, the Department was expanded to include the Departments of Norfolk and the Peninsula (of Virginia). Gen. Johnston was eventually forced into maneuvering the Army southward to the defenses of Richmond during the opening of the Peninsula Campaign, where it conducted delay and defend tactics until Johnston was severely wounded at the Battle of Seven Pines. During the months after the First Battle of Bull Run, Johnston organized his Shenandoah Army and Beauregard's Potomac Army into two divisions under a unified command with Gustavus Smith