General George Stoneman - CDV of Stoneman in a waist up pose. Stoneman trained at West Point, where his roommate was Stonewall Jackson. At the Battle of Chancellorsville Stoneman failed in an ambitious attempt to penetrate behind enemy lines, getting bogged down at an important river crossing. Hooker placed much of the blame for the Union army's defeat on Stoneman. His sharp criticism may have been in part intended to deflect blame placed on himself for the North's defeat. While commanding cavalry under W.T. Sherman in Georgia, Stoneman was captured by confederate soldiers, but soon exchanged. He was the 15th governor of California. Back marked E&HT Anthony, Brady’s National Portrait Gallery.