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
XI Corps (Union Army) Virginia. Col. Nathaniel McLean was promoted to brigadier general and succeeded Robert Schneck as commander of the 1st Division. During the fall months, the XI Corps occupied various outposts along the Potomac River and Northern Virginia. In December, it marched to Fredericksburg, but was not present at the battle, after which it went into winter quarters at Stafford, Virginia. With the ascension of Joseph Hooker to command of the army in February 1863, Franz Sigel was the second most senior officer in the ranks. Because of this and because the XI Corps was the smallest in the Army of the