Johnston was prematurely discharged from hospital on November 24, 1862, and appointed to command the Department of the West, the principal command of the Western Theater, which gave him titular control of Gen. Braxton Bragg's Army of Tennessee and Lt. Gen. John C. Pemberton's Department of Mississippi and East Louisiana. (The other major force in this area was the Trans-Mississippi Department, commanded by Lt. Gen. Theophilus H. Holmes, stationed principally in Arkansas. Johnston argued throughout his tenure that Holmes's command should be combined with Pemberton's under Johnston's control, or at least to reinforce Pemberton with troops from Holmes's command, but he was unable to convince the government to take either of these steps.)