The ground selected for battle was that inclosed between Owl and Lick creeks, which run nearly parallel with each other, and empty into the Tennessee river. The flanks of the two armies rested upon these little streams, and the front of each was just the distances, at their respective positions, between the two creeks. The Confederate front was, consequently, a little more than three miles long. The distance between the creeks widens somewhat, as they approach the river, and the Federal army had more ground upon which to deploy. The position which the enemy occupied next morning, is five or six miles from the river, and his advance camp was perhaps a mile southward of Shiloh Church. He had, as yet, established no line; the attack next morning took him completely by surprise, and he formed after the fight had commenced.
General Johnson's effective strength, including all the forces available for that battle, was about thirty-five thousand men. That of the enemy was, perhaps, forty-five thousand men. The advantages of attack and surprise would, General Johnson thought, more than counterbalance his numerical inferiority. If Buell brought reinforcements to his opponents, by forced marches, in advance of his army, he would feel their effect only in a stronger line, and more stubborn resistance upon the front--his flanks would be safe in any event. The array of his forces evinced a resolution to break through and crush, at any cost, whatever should confront him in the narrow space where the whole conflict would be crowded.
The troops were bivouacked that night upon the ground which it was intended that they should occupy in line of battle. No disposition which could be made that evening was delayed; every precaution was taken to guard against a further procrastination of the attack. The men laid down to sleep in the order in which they were to rush upon the enemy.
General Hardee had command of the first line, General Bragg of the second, and General Polk of the third. General Hardee's line extended from the one creek to the other, and as his corps (fully deployed) could not properly occupy the entire distance, he was reinforced by a fine brigade under Brigadier General Gladden. To Hardee was given the honor of commencing the battle, and he was ordered to push his whole line rapidly forward, at early dawn. General Bragg's line was formed similarly to General Hardee's, and about a quarter of a mile in its rear. Bragg was ordered to advance simultaneously with Hardee, and to support him when he needed assistance. Then, at the distance of eight hundred yards, came General Polk's corps, not deployed, but formed in column of brigades. General Breckinridge's division (over six thousand strong) constituted the reserve, and was close in the rear of Polk's corps. The cavalry was promiscuously disposed--indeed, no one in authority seemed to think it could win the battle. Morgan's squadron was formed with the Kentucky troops, and occupied the extreme left of Breckinridge's division. This disposition of the forces and the energetic conduct of the Confederate commanders, explain the striking features of the battle, which have been so often remarked--the _methodical_ success of the Confederates, upon the first day, the certainty with which they won their way forward against the most determined resistance; the "clock-like" regularity of their advance, the desperate struggle, the Federal retreat, repeated again and again through the day. Taking into consideration the circumstances under which the collision occurred, military _savants_ will, some day, demonstrate that success ought, with mathematical certainty, to have resulted from the tactics of General Johnson. An army moving to attack (an enemy, surprised and unprepared), in three lines, supported by a reserve, and with its flanks perfectly protected, ought to have delivered crushing and continuous blows. Such a formation, directed by consummate skill and the finest nerve in a commander, of troops who believed that to fight would be to win, promised an onset well nigh irresistible.