On April 6, 1864, Major-General William T. Sherman writes from Headquarters, Military Division of the Mississippi, to Maj. Gen. Geo. H. Thomas, Comdg. Department of the Cumberland, Chattanooga, advising him of changes in Thomas's command. Furloughed veterans are retained. Hovey's Division of 5,000 infantry will move to the Hiwassee River, relieving the previously detached Fourth Corps. Thomas will have complete control of the army. His left will be Cleveland [Tennessee], his Center will be Chattanooga, and his right will be Stevenson [Alabama]. He discusses communication routes (Nashville to Columbia [Tenn.]). Reserve mounted-cavalry positions for the best men.
Official Records, Series 1, Vol. 32, Pt. 3 (Correspondence, Etc.--Union), Chp. 44, 271-272 (Sherman to Thomas, Nashville, 6 April 1864).