Third Corps, Army of Northern Virginia Third Corps, Army of Northern Virginia The Third Corps, Army of Northern Virginia was a unit of the Provisional Army of the Confederate States. After the death of Lt. General Thomas J. Jackson at the Battle of Chancellorsville, Robert E. Lee reorganized his army from two infantry corps into three corps, giving command of the new Third Corps to A. P. Hill. For Hill's new corps, Lee assigned Hill's old "Light Division", commanded by Major General William Dorsey Pender, from the Second Corps and Richard H. Anderson's division from James Longstreet's First Corps. For the Corps' third division, Lee created
General officers in the Confederate States Army combat, to be the senior general officer in the CSA. That seniority strained the relationship between Joseph E. Johnston and Jefferson Davis. Johnston considered himself the senior officer in the Confederate States Army and resented the ranks that President Davis had authorized. However, his previous position in the U.S. Army was staff, not line, which was evidently a criterion for Davis regarding establishing seniority and rank in the subsequent Confederate States Army. On February 17, 1864, legislation was passed by the Congress to allow President Davis to appoint an officer to command the Trans-Mississippi Department in the Far West, with