Prentiss' division in the front line, and W.H.L. Wallace's on the plateau between the river and Brier Creek, were more widely separated in camp than any other two divisions; but in the contest of Sunday they operated together.
Colonel Moore, of the Twenty-first Missouri, being wounded early in the encounter with the Confederate advance, Lieutenant-Colonel Woodyard took command of the regiment, together with the accompanying detachment of the Twenty-fifth Missouri and four companies of the Sixteenth Wisconsin, sent out the night before to reinforce the pickets. Pushed by Shaver's brigade, he fell back after a struggle on the edge of a field to the farther side of a narrow ridge, about half a mile from camp, where he was joined by Colonel Peabody with the rest of the brigade. After a contest of half an hour, Shaver was repulsed and fell back. General A.S. Johnston observing men dropping out of the ranks of the retreating brigade, rallied it himself and ordered it to renew the attack. Peabody recoiled under the fresh onset, and, falling back, took his place, constituting the right of the line of battle of the division formed a quarter of a mile in advance of the camp.
Gladden's brigade, forming part of Bragg's corps, on the second line of Johnston's army, was moved forward to extend the right of Hardee on the first line, when, by the divergence of Lick Creek from Owl Creek, Hardee's line became inadequate to fill the distance between them. The line of Johnston's advance being oblique to the line of Prentiss' front, Gladden arrived in front of Prentiss' left after Shaver had become engaged with Peabody. Colonel Adams, who took command of the brigade upon the death of General Gladden, and who made the full report of the brigade, says they arrived in position at eight o'clock. Colonel Deas, who took command when Adams was wounded, says they arrived a little after seven. Colonel Loomis, who was in command on the return to Corinth, says in his report, made April 13th, that the engagement of this brigade began at half-past seven. Wheeling to the left and deploying into line, the brigade moved confidently forward. Gladden was mortally wounded and his command fell back in confusion. General Johnston ordered it to return to the attack, but, on inspecting its condition, countermanded the order.
Chalmers' brigade, coming up from the second line, made an impetuous charge. Jackson's brigade, which followed in rear of Chalmers, moved forward and joined in the attack. Prentiss fell back and made a stand immediately in front of his camp. After a gallant but short struggle, his division, about nine o'clock, gave way and fell back through his camp, leaving behind Powell's guns and caissons and two of Hickenlooper's guns, all the horses of Hickenlooper's two guns being killed. The line was broken and disordered by the tents. The Twenty-fifth Missouri, and portions of other regiments drifted to the rear. On the summit of a slope, covered by dense thicket, not far to the rear of his camp, Prentiss rallied the Eighteenth and Twenty-first Missouri, Twelfth Michigan, and Eighteenth Wisconsin. The Sixty-first Illinois and Sixteenth Wisconsin were also rallied, but detached to form in reserve to Hurlbut. The Twenty-third Missouri, arriving by boat at the landing after the battle had begun, moved out at once and took position in Prentiss' new line. In this position his left was near the extreme southern head of the ravine of Brier Creek; thence his line extended along an old, sunk, washed-out road running a little north of west, and reached nearly to the Corinth road. Prentiss in person put Hickenlooper's battery in position immediately to the right of the Corinth road, near the intersection of the roads. Prentiss' men used the road cut as a defence, lying down in it and firing from it. General Grant, visiting Prentiss, approved the position and directed him to hold it at all hazards. The order was obeyed. Continually assaulted by successive brigades, he repelled every attack and held the position till the close of the day.
General W.H.L. Wallace, commanding Smith's division, formed his regiments at eight o'clock. Some of the regiments loaded their wagons and received extra ammunition. At half-past eight o'clock the division moved; McArthur with two of his regiments, the Ninth and Twelfth Illinois, went to support Stuart's brigade at its isolated camp at the extreme left of the National line, having sent the Thirteenth Missouri to Sherman, and left the Fourteenth Missouri and Eighty-first Ohio to guard the bridge over Snake Creek, on the Crump's Landing road. Wallace led his other two brigades to the support of Prentiss, placing Tuttle on Prentiss' right, and Sweeney to the right of Tuttle. Tuttle's left was about one hundred yards to the right of the Corinth road, and the division line extending northwestwardly behind a clear field, Sweeney's right reached the head of a wide, deep ravine—called in some of the Confederate reports a gorge—which ravine, filled with impenetrable thickets, extended from his right far to his rear and ran into the ravine of Brier Creek. Wallace added to the defence of this ravine by posting sharpshooters along its border. General Wallace detached the Eighth Iowa from Sweeney's brigade and placed it across the Corinth road, filling the interval between the two divisions.
Wallace's line was barely formed when, at ten o'clock, Gladden's brigade, now commanded by Colonel Adams, moved again against Prentiss. Advancing slowly up the slight ascent through impeding thickets, against an unseen foe, it encountered a blaze of fire from the summit, faltered, wavered, hesitated, retreated, and withdrew out of range. A.P. Stewart led his brigade against Wallace's front, was driven back, returned to the assault, and was again hurled back; but still rallied, and moved once more in vain, to be again sent in retreat.
The Confederates gave this fatal slope the name "The Hornet's Nest." General Bragg ordered Gibson with his brigade to carry the position. The fresh column charged gallantly, but the deadly line of musketry in front, and an enfilading fire from the well-posted battery, mowed down his ranks; and Gibson's brigade fell back discomfited. Gibson asked for artillery. None was at hand. Bragg ordered him to charge again. The colonels of the four regiments thought it hopeless. The order was given. The brigade struggled up the tangled ascent; but once more met the inexorable fire that hurled them back. Four times Gibson charged, and was four times repulsed. Colonel Allen, of the Fourth Louisiana, one of Gibson's regiments, rode back to General Bragg to repeat the request for artillery. Stung by the answer, "Colonel Allen, I want no faltering now," he returned to his regiment, led it in a desperate dash up the slope, more persistent, and therefore more destructive, and returned with the fragment of his command that was not left strewn upon the hill-side. As the line of Sherman and McClernand continually contracted as they fell back, the successive reinforcements pushed in toward the left of the Confederate line gradually pressed Hindman's two brigades—first wholly against McClernand's front, then against his left, then beyond his line. These two brigades were then moved to the front of W.H.L. Wallace. Flushed with victory, they advanced with confidence. The same resistless fire wounded Hindman and drove back his command. Led by General A.P. Stewart, the brigades gallantly advanced again and rushed against the fatal fire, only to be shivered into fragments that recoiled, to remain out of the contest for the rest of the day.
The commander of the Confederate Army was killed farther to the right, at half-past two o'clock in the afternoon. As the news of this loss spread, there was a feeling of uncertainty and visible relaxation of effort in parts of his command. In front of Prentiss and Wallace attack was suspended about an hour.
Hickenlooper's four guns, standing at the salient where Prentiss and Wallace joined, sweeping both fronts, had all day long been reaping bloody harvests among the lines of assailants that strove to approach. So near, yet so far; in plain view, yet out of reach, the little battery exasperated the baffled brigades while it extorted their admiration. General Ruggles sent his staff officers in all directions to sweep in all the guns they could reach. He gives the names of eleven batteries and one section which he planted in a great crescent, pouring in a concentric fire. From this tornado of missiles Hickenlooper withdrew his battery complete, and, passing to the rear through Hurlbut's camp, reported to Sherman for further service.
The terrible fire of this artillery was supplemented by continued, but desultory infantry attacks. The Crescent regiment of Louisiana essayed to charge, but recoiled. Patton Anderson led his brigade up, but was driven back. About four o'clock, Hurlbut, whose right had joined Prentiss' left, finally gave way, and Bragg, following him, passed on to the rear of Prentiss. By half-past four the fighting in front of Sherman and McClernand had ceased, and Cheatham, Trabue, Johnson, and Russell, finding that Wallace could not be approached across the dense tangle filling the great ravine which protected his right, felt their way unopposed to the plateau in his rear, meeting the combined force under Bragg in front of Hurlbut's camp. General Polk collected in front of the steadfast men of Prentiss and Wallace all the other troops within reach, and at five o'clock, with one mighty effort, surged against their line, now pounded by Ruggles' batteries.