Second Division - Army of the Tennessee
Brigadier General W.H.L. Wallace

This division, composed of three brigades of infantry, four batteries of artillery, and four companies of cavalry, was commanded by Brig. Gen. C. F. Smith until April 2, 1862, when, on account of Smith's disability, Brig. Gen. W. H. L . Wallace was assigned to the command. The division arrived at Pittsburg Landing March 18 and established its camp near the river between Corinth road and Snake Creek. It formed at 8 a.m. Sunday morning, April 6th, when the First and Second Brigades and three batteries were conducted by Wallace to a position on Corinth road just east of Duncan Field, where Tuttle's brigade was formed south of the road, and two regiments of Sweeny's brigade on north side of the road. The other regiments of Sweeny's brigade were held in reserve for a time and then distributed to different parts of the field. McArthur's brigade was detached from the division and served on other parts of the field. Batteries D, H, and K, First Missouri Light Artillery, were placed on a ridge behind Tuttle's brigade. In this position Wallace was attacked at about 9:30 a.m. by Shaver's brigade, assisted by artillery located in the Review field. At 10:30 a.m. the attack was renewed by Shaver, Stephens, and Stewart, followed at noon by four determined attacks by Gibson's brigade. General Ruggles then took charge of the Confederate forces in front of Wallace and assembled ten batteries and two sections of artillery on the west side of Duncan Field, and sent Wood, Anderson, Stewart, and Cleburne to reenforce Shaver in a renewed attack upon Wallace's front. At the same time the Union forces on Wallace's right and left retired, allowing the enemy to gain his flanks and rear. Seeing that he was being surrounded, Wallace sent his batteries to the rear and then attempted to move his infantry out by the flank along the Pittsburg road. While riding at the head of his troops and near the fork of the Eastern Corinth road he received a mortal wound and was left for dead upon the field. When that part of the field was recovered on Monday General Wallace was found alive. He was taken to Savannah, where he died on the 10th. Four regiments of the division, under the command of Colonel Tuttle, retired to the right of the siege guns where the troops remained in line Sunday night. On Monday the infantry commanded by Tuttle acted as reserve to Crittenden's division of the army of the Ohio, until about noon, when it advanced to front line on Crittenden's right and participated in all the after battles of the day. Battery A, First Illinois Light Artillery, served with McArthur's brigade on Sunday and had three guns in action with Sherman on Monday. The three Missouri batteries, when they retired from Wallace's line at 5 p.m., reported to Colonel Webster near the Landing and were put in line, where they assisted in repelling the last Confederate attack on Sunday. They were not engaged on Monday.

First Brigade - Colonel James M. Tuttle

Second Brigade - Brigadier General John McArthur

Third Brigade - Colonel Thomas W. Sweeny