Three were short-lived: * In the Army of Virginia: * Irvin McDowell (June 26, 1862 – September 5, 1862); * James B. Ricketts (September 5, 1862 – September 6, 1862); * Joseph Hooker (September 6, 1862 – September 12, 1862) * In the Army of the Ohio: * Charles C. Gilbert (September 29, 1862 – October 24, 1862) * In the Army of the Cumberland: * Charles C. Gilbert (October 24, 1862 – November 5, 1862) The other, the III Corps, Army of the Potomac (March 13, 1862 – March 24, 1864), is the subject of this article.