within the Army; Sumner was selected as one of four corps commanders by President Lincoln, based on his seniority. The II Corps, commanded during the war by Sumner, Darius N. Couch, Winfield Scott Hancock, and Andrew A. Humphreys, had the deserved reputation of being one of the best in the Eastern Theater. Sumner, who was the oldest of the generals in the Army of the Potomac, led his corps throughout the Peninsula Campaign and the Seven Days Battles. McClellan originally formed a poor opinion of Sumner during the Battle of Williamsburg on May 5, 1862. During McClellan's absence, Sumner directed the inconclusive battle, which failed to impede the Confederate withdrawal up the Peninsula, and McClellan wrote to his wife, "Sumner had proved that he was even a greater fool than I had supposed & had come within an ace of having us defeated." At the Battle of Seven Pines, however, Sumner's initiative in sending reinforcing troops across the dangerously rain-swollen Chickahominy River prevented a Union disaster. He received the brevet of major general in the regular army for his gallantry at Seven Pines. Sumner was struck in the arm and hand by spent balls at the Battle of Glendale. Despite his old-fashioned ideas on discipline and respect for commanding officers, the II Corps troops generally had a positive opinion of him. Sumner was promoted to major general of volunteers on July 4, 1862, with the rank dated to May 5. In the fall of 1862, at the Battle of Antietam, Sumner was the center of controversy for ordering Brig. Gen. John Sedgwick's division to launch an attack into the West Woods on the morning of the battle. The assault was devastated by a Confederate counterattack, and Sedgwick's men retreated in great disorder to their starting point with over 2,200 casualties. Sumner has been condemned by most historians for his "reckless" attack, his lack of coordination with the other corps commanders, accompanying Sedgwick's division personally and losing control of his other attacking division, failing to perform adequate reconnaissance prior to launching his attack, and selecting an unusual line of battle formation that was so effectively flanked by the Confederate counterattack. Historian M. V. Armstrong's recent scholarship, however, has determined that Sumner did perform appropriate reconnaissance and his decision to attack where he did was justified by the information available to him. Sumner's other divisions drove the weak Confederate center back, but