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
Cavalry Corps, Army of Northern Virginia cavalry in the Eastern Theater was limited to regiments or smaller units attached to districts or larger formations. Noteworthy were Stuart's 1st Virginia Cavalry, the 30th Virginia Cavalry and Hampton's Legion from South Carolina. Recommendations and endorsements from Generals P.G.T. Beauregard, Joseph E. Johnston and James Longstreet led to a promotion to Brigadier General for Stuart in September 1861; and the formation of a unified cavalry brigade under his command. On August 17, 1862 the cavalry division was built – swollen to four brigades in less than a year. On September 9, 1863 the Cavalry Corps was finally established with