The Cavalry Corps got off to a good start in May 1863, but quickly bogged down after crossing the Rapidan River. During the entire battle, Stoneman accomplished little, and Hooker considered him one of the principal reasons for the Union defeat at Chancellorsville. Hooker needed to deflect criticism from himself and relieved Stoneman of his cavalry command, sending him back to Washington, D.C., for medical treatment (chronic hemorrhoids, exacerbated by cavalry service), where in July he became a Chief of the U.S. Cavalry Bureau, a desk job. A large cavalry supply and training depot on the Potomac River was named Camp Stoneman in his honor. In early 1864, Stoneman was impatient with garrison duty in Washington and requested another field command from his old friend Maj. Gen. John Schofield, who was in command of the Department of the Ohio. Although originally slated for an infantry corps, Stoneman assumed command of the Cavalry Corps of what would be known as the Army of the Ohio. As the army fought in the Atlanta Campaign under Maj. Gen. William T. Sherman, Stoneman commanded an unsuccessful raid of the infamous Andersonville Prison. In the course of the raid he and his aide, Myles Keogh were captured by Confederates outside of Macon, Georgia. However, the 5th Indiana Cavalry Regiment under Col. Thomas Butler made a valiant stand, allowing the rest of his forces to retreat. They were surrendered as well, despite protest by Col. Butler. Stoneman became the highest-ranking Union prisoner of war, and he remained prisoner for three months. Stoneman was exchanged relatively quickly due to the personal request of General Sherman. Following his release, Stoneman was briefly the commander of the Department of the Ohio. In December 1864, Stoneman led a raid through southwestern Virginia. In March 1865, Stoneman took roughly 4,000 troops out of Knoxville, Tennessee, and led them on a raid of Virginia and North Carolina, the intent being to cripple Confederate infrastructure and demoralize the population. Within a week, they had sacked the towns of Hillsville, Asheville, and Christiansburg, among others, and destroyed several bridges, lead mines and railroads. Postbellum politics In June 1865, following the end of war, Stoneman was put in command of the Department of Tennessee in occupied Memphis. Stoneman was criticized for inaction in the early days of the 1866 Memphis riots, which may have increased the damage. Stoneman was subject to a congressional investigation, but