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 Burnside's Bridge proved to be too much for Lee and his Confederate army. Luckily for Lee, the arrival of A.P. Hill's troops and the mixture of McClellan's and Burnside's sluggishness, saved Lee's Army of Northern Virginia and allowed them to barely hold off the Union in Maryland. Although the Army of Northern Virginia swelled and shrank over time, its units of organization consisted primarily of corps, earlier referred to as "wings" or "commands": The Army fought in a number of campaigns and battles, including: On April 9, 1865, the Army of Northern Virginia surrendered to the Army of the Potomac