Longstreet its anvil. In the Northern Virginia Campaign of August 1862 this stereotype did not hold true. Longstreet commanded the Right Wing (later to become known as the First Corps) and Jackson commanded the Left Wing. Jackson started the campaign under Lee's orders with a sweeping flanking maneuver that placed his corps into the rear of Union Maj. Gen. John Pope's Army of Virginia. The Hotchkiss journal shows that Jackson, most likely, originally conceived the movement. In the journal entries for March 4 and 6, 1863, General Stuart tells Hotchkiss that "Jackson was entitled to all the credit" for the movement and that Lee thought the proposed movement "very hazardous" and "reluctantly consented" to the movement. At Manassas Junction, Jackson was able to capture all of the supplies of the Union Army depot. Then he had his troops destroy all of it, for it was the main depot for the Union Army. Jackson then retreated and then took up a defensive position and effectively invited Pope to assault him. On August 28–29, the start of the Second Battle of Bull Run (Second Manassas), Pope launched repeated assaults against Jackson as Longstreet and the remainder of the army marched north to reach the battlefield. On August 30, Pope came to believe that Jackson was starting to retreat, and Longstreet took advantage of this by launching a massive assault on the Union army's left with over 25,000 men. Although the Union troops put up a furious defense, Pope's army was forced to retreat in a manner similar to the embarrassing Union defeat at First Bull Run, fought on roughly the same battleground. When Lee decided to invade the North in the Maryland Campaign, Jackson took Harpers Ferry, then hastened to join the rest of the army at Sharpsburg, Maryland, where they fought McClellan in the Battle of Antietam (Sharpsburg). Antietam was primarily a defensive battle against superior odds, although McClellan failed to exploit his advantage. Jackson's men bore the brunt of the initial attacks on the northern end of the battlefield and, at the end of the day, successfully resisted a breakthrough on the southern end when Jackson's subordinate, Maj. Gen. A. P. Hill, arrived at the last minute from Harpers Ferry. The Confederate forces held their position, but the battle was extremely bloody for both sides, and Lee withdrew the Army of Northern Virginia back across the Potomac River, ending the