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 artillery formed an Artillery Corps with 109 cannons. The Army of Northern Virginia was established on March 14, 1862, again under Johnston. Though the military department stayed existent its role changed into an administrative division for most of the war. At the outset of the Peninsula Campaign the Army of Northern Virginia had more than 55,633 soldiers. The cannon was assigned to the brigades, as well as the Reserve's artillery. Nominally, Jackson's Corps in the Shenandoah Valley, was subordinate to the Army. Since Jackson led his own campaign at the time of the Peninsula Campaign and was not under Lee's