Confederate Army of the Shenandoah Harpers Ferry, Virginia (modern day West Virginia). To organize and train the companies, Virginia state commander Robert E. Lee initially appointed Thomas J. Jackson to command the post. Jackson formed five regiments of infantry and a battery of artillery from the various companies, forming the basis of the Stonewall Brigade. On May 15, Joseph E. Johnston replaced Jackson as commander of Harpers Ferry and continued to receive additional regiments from throughout the Confederacy. He would eventually have four brigades of infantry and an independent regiment of cavalry, the 1st Virginia Cavalry commanded by J. E. B. Stuart. In mid-June, forces
Army of Northern Virginia John R. Jones, Alexander Lawton, A.P. Hill, and D.H. Hill. The Northern Virginia and Maryland Campaigns still showed numerous defects in the organization and leadership of the Army of Northern Virginia, particularly the high rate of straggling and desertion during the invasion of Maryland. Lee had fewer than 40,000 men on the field at Antietam, the smallest his army would be until the Appomattox Campaign, and the battle was largely fought on autopilot with minimal involvement by the senior officers in the army. During the Fredericksburg Campaign, Longstreet had the divisions of Anderson, Hood, McLaws, Ransom, and George Pickett, who