Units: Army of W. Tenn.- 1st thru 6th Divisions, Army of the Ohio - 2nd, 4th, 5th Divisions, 21st Brigade of 6th Division, Gunboats the Tyler and Lexington. Losses: Union - 1,735 killed, 7,882 wounded, 3,956 captured. Confederacy - 1,728 killed, 8,012 wounded, 959 captured. The Confederate surprise attack on General Grant's unprepared troops at Shiloh, Tennessee resulted in a bitter struggle. For many soldiers, both North and South, it was their last battle. 13,000 Union troops and 10,000 Confederate troops were killed. (more men than in all previous American wars combined) By the end of the first day the Union troops were all but defeated. However, during the night reinforcements arrived. By the next morning Union forces commanded the field. When the Confederates retreated, the exhausted Union forces did not follow.