First Division: Major General John A. McClernand
Second Division: Brig. General W. H. L. Wallace
Third Division: Major General Lew Wallace
Fourth Division: Brig. General Stephen A. Hurlbut
Fifth Division: Brig. General William T. Sherman
Sixth Division: Brig. General Benjamin M. Prentiss
Who were the six division commanders of the Army of the Tennessee at the beginning of the Battle of Pittsburg Landing? Stephen A. Hurlbut, John A. McClernand, Benjamin M. Prentiss, William T. Sherman, Lew Wallace, William H. L. Wallace.
1st Div: John McClernand
2nd Div: W.H.L. Wallace, succeeded by James Tuttle at Wallace's being mortally wounded.
3rd Div: Lew Wallace
4th Div: Stephen Hurlbut
5th Div: William Sherman
6th Div: Ben Prentiss
Clark, Cheatham, Ruggles and Withers commanded what were designated as divisions that were incorporated into 2 corps commanded by Bragg and Polk. Hardee and Breckinridge commanded what were designated as corps, but were formations of three brigades each which made them effectively divisions.
Edit - The Army of the Tennessee was on the Union side.
Divisions, April 6, 1862:
1. Major General John A McClernand
2. Brigadier General W H L Wallace
3. Major General Lew Wallace
4. Brigadier General Stephen A Hurlbut
5. Brigadier General William T Sherman
6. Brigadier General Benjamin M Prentiss
Major General John A. McClernand, First Division;
Brigadier General W. H. L. Wallace, Second Division;
Major General Lew Wallace, Third Division;
Brigadier General Stephen A. Hurlbut, Fourth Division;
Brigadier General William T. Sherman, Fifth Division;
Brigadier General Benjamin M. Prentiss, Sixth Division.
The Army of the Tennessee, commanded by Maj. Gen. U. S. Grant,
was, on the 5th of April, 1862, composed of six divisions. The First,
commanded by Maj. Gen. John A. McClernand; the Second, by Brig.
Gen. W. H. L. Wallace; the Third, by Maj. Gen. Lew. Wallace; the
Fourth, by Brig. Gen. S. A. Hurlbut; the Fifth, by Brig. Gen. W. T.
Sherman, and the Sixth, by Brig. Gen. B. M. Prentiss.
John A. McClernand, W.H.L Wallace, Lew Wallace, Stephen A. Hurlbut, William T. Sherman and Benjamin M. Prentiss. After W.H.L. Wallace was mortally wounded, command of the Second Division passed to Colonel James M. Tuttle.