More than two dozen men from Maine served in the Union army as generals, and dozens more Mainers led brigades at one time or another as colonels. The highest-ranking officer was Maj. Gen. Oliver O. Howard of Leeds, who commanded the XI Corps in several major battles, including Chancellorsville and Gettysburg. He had lost an arm at the Battle of Seven Pines during the 1862 Peninsula Campaign. In the fall of 1863, Howard and his corps were transferred to the Western Theater to join the Army of the Cumberland in Tennessee. In the Battle of Chattanooga, Howard's corps helped capture Missionary Ridge and force the retreat of Gen. Braxton Bragg. In July 1864, Howard became commander of the Army of the Tennessee and fought in the Atlanta Campaign. He led the right wing of Maj. Gen. William T. Sherman's forces in the famous March to the Sea and the subsequent Carolinas Campaign.