 He commanded the brigade throughout the Seven Days fighting at the Battle of White Oak Swamp and Malvern Hill, where he was wounded, mustered out and recommissioned.Jones healed and rejoined the army during the Maryland Campaign and took command of the Stonewall Division, which then captured the Union outpost at Harpers Ferry.At the Battle of Antietam, his brigade was one of two on the front line and attacked early on September 17.