 He fought at Second Bull Run and Antietam, where he was badly injured when his horse fell on him.While recuperating, he served on the Fitz John Porter court-martial, a highly political case, where his loyalties are believed to have cost him promotion.Later he commanded a division in the Overland campaign, and a corps in the Shenandoah Valley Campaign under Sheridan, where he received a chest wound at Cedar Creek that disabled him for life.