21st (Carter's) Cavalry Regiment, organized in September, 1864, was never officially numbered. It was usually called Carter's Scouts or Wheeler's Scouts. The unit skirmished in Tennessee and Alabama, then with about 600 or 700 men moved back to Tennessee with Hood. It fought at Franklin, saw action in the demonstration against Murfreesborough in December, then was stationed at Shelbyville. The regiment ended the war in Alabama and surrendered with the Department of Alabama, Mississippi, and East Louisiana. Its commanders were Colonel Nathan W. Carter, Lieutenant Colonel Robert Withers, and Major R.H. Dudley.