During the 1863 Vicksburg campaign, Union forces under Maj. Gen. U.S. Grant, made up of the 13th Corps and Logan's Division of the 17th Corps, fought Confederate forces under Brig. Gen. John S. Bowen, whose command included Tracy's, Cockrell's, Green's, and Baldwin's Brigades, the 6th Mississippi Infantry, the Botetourt (Virginia) Artillery, and part of Hudson's (Mississippi) Battery. Many Confederate regiments reached the field after forced marches and with thinned ranks. Tracy's Brigade held the right of the Confederate line, while Green's and the 6th Mississippi held the left. The battle opened early as Carr's and Hovey's Divisions advanced on the Union right and Osterhaus' on the left, with Smith's Division in reserve. About 10 A.M., the Confederate left was driven back, and Baldwin's Brigade, just arrived, formed a new line about one and one-half miles behind the first position. Two newly arrived regiments of Cockrell's Brigade were posted on this new line, while Green's Brigade and one newly arrived regiment of Cockrell's Brigade were ordered to the Confederate right, which had withdrawn slightly from its first position. The First Brigade of Logan's Division went to the Union left on arrival, the Third reinforced the Union right, and Smith's Division became engaged, while the Second Brigade of Logan's Division did not reach the field until near the close of the battle. The Confederate line held until 5:30 P.M., when both wings were driven from their positions and fell back across Bayou Pierre, with the First and Fourth Missouri Infantry (Consolidated) of Cockrell's Brigade arriving in time to help cover the retreat. Union casualties were 131 killed, 719 wounded, and 25 missing, and Brig. Gen. E.D. Tracy and three other officers were killed.
