On July 30, 1864, the U.S. War Department issued General Orders, No. 238, appointing Oliver O. Howard to command the Army and Department of the Tennessee, Henry Slocum to replace Joseph Hooker as commander of the 20th Army Corps, and David Stanley to command the 4th Army Corps.
General Orders, No. 238
War Department, Adjutant General’s Office
Washington, July 30, 1864
The following assignments are hereby made:
1. Major General O. O. HOWARD to the command of the Army and Department of the Tennessee.
2. Major General H. W. SLOCUM to the command of the 20th Army Corps, vice Major General HOOKER, who is relieved at his own request.
3. Major General D. S. STANLEY to the command of the 4th Army Corps, vice Major General HOWARD, transferred to the Army and Department of the Tennessee.
BY ORDER OF THE PRESIDENT OF THE UNITED STATES:
Assistant Adjutant General.