On December 29, 1862, Union Major General William T. Sherman's XIII Corps attempted to seize the high ground at Walnut Hills on the same side of the Yazoo River as Vicksburg, Mississippi. Here's how he described the resulting battle in his memoirs
The Mississippi boats were admirably calculated for handling troops, horses, guns, stores, etc., easy of embarkation and disembarkation, and supplies of all kinds were abundant, except fuel. For this we had to rely on wood, but most of the wood-yards, so common on the river before the war, had been exhausted, so that we had to use fence-rails, old dead timber, the logs of houses, etc. Having abundance of men and plenty of axes, each boat could daily procure a supply.The position Sherman attacked at Walnut Hills resembled the position at Marye's Heights in the Battle of Fredericksburg: Union troops were channeled into narrow approaches covered by multiple lines of Confederate troops and chewed up as they advanced piecemeal. To his credit, recognizing the futility, Sherman called off his assault much sooner than Burnside had at Fredericksburg.
In proceeding down the river, one or more of Admiral Porter's gunboats took the lead; others were distributed throughout the column, and some brought up the rear. We manoeuvred by divisions and brigades when in motion, and it was a magnificent sight as we thus steamed down the river. What few inhabitants remained at the plantations on the river-bank were unfriendly, except the slaves; some few guerrilla-parties infested the banks, but did not dare to molest so, strong a force as I then commanded.
We reached Milliken's Bend on Christmas-day, when I detached one brigade (Burbridge's), of A. J. Smith's division, to the southwest, to break up the railroad leading from Vicksburg toward Shreveport, Louisiana. Leaving A. J. Smith's division there to await the return of Burbridge, the remaining three divisions proceeded, on the 26th, to the mouth of the Yazoo, and up that river to Johnson's plantation, thirteen miles, and there disembarked Steele's division above the mouth of Chickasaw Bayou, Morgans division near the house of Johnson (which had been burned by the gunboats on a former occasion), and M. L. Smith's just below. A. J. Smith's division arrived the next night, and disembarked below that of M. L. Smith. The place of our disembarkation was in fact an island, separated from the high bluff known as Walnut Hills, on which the town of Vicksburg stands, by a broad and shallow bayou-evidently an old channel of the Yazoo. On our right was another wide bayou, known as Old River; and on the left still another, much narrower, but too deep to be forded, known as Chickasaw Bayou. All the island was densely wooded, except Johnson's plantation, immediately on the bank of the Yazoo, and a series of old cotton-fields along Chickasaw Bayou. There was a road from Johnson's plantation directly to Vicksburg, but it crossed numerous bayous and deep swamps by bridges, which had been destroyed; and this road debouched on level ground at the foot of the Vicksburg bluff, opposite strong forts, well prepared and defended by heavy artillery. On this road I directed General A. J. Smith's division, not so much by way of a direct attack as a diversion and threat.
Morgan was to move to his left, to reach Chickasaw Bayou, and to follow it toward the bluff, about four miles above A. J. Smith. Steele was on Morgan's left, across Chickasaw Bayou, and M. L. Smith on Morgan's right. We met light resistance at all points, but skirmished, on the 27th, up to the main bayou, that separated our position from the bluffs of Vicksburg, which were found to be strong by nature and by art, and seemingly well defended. On reconnoitring the front in person, during the 27th and 28th, I became satisfied that General A. J. Smith could not cross the intervening obstacles under the heavy fire of the forts immediately in his front, and that the main bayou was impassable, except at two points—one near the head of Chickasaw Bayou, in front of Morgan, and the other about a mile lower down, in front of M. L. Smith's division.
During the general reconnoissance of the 28th General Morgan L. Smith received a severe and dangerous wound in his hip, which completely disabled him and compelled him to go to his steamboat, leaving the command of his division to Brigadier General D. Stuart; but I drew a part of General A. J. Smith's division, and that general himself, to the point selected for passing the bayou, and committed that special task to his management.
General Steele reported that it was physically impossible to reach the bluffs from his position, so I ordered him to leave but a show of force there, and to return to the west side of Chickasaw Bayou in support of General Morgan's left. He had to countermarch and use the steamboats in the Yazoo to get on the firm ground on our side of the Chickasaw.
On the morning of December 29th all the troops were ready and in position. The first step was to make a lodgment on the foot-hills and bluffs abreast of our position, while diversions were made by the navy toward Haines's Bluff, and by the first division directly toward Vicksburg. I estimated the enemy's forces, then strung from Vicksburg to Haines's Bluff, at fifteen thousand men, commanded by the rebel Generals Martin Luther Smith and Stephen D. Lee. Aiming to reach firm ground beyond this bayou, and to leave as little time for our enemy to reenforce as possible, I determined to make a show of attack along the whole front, but to break across the bayou at the two points named, and gave general orders accordingly. I pointed out to General Morgan the place where he could pass the bayou, and he answered, "General, in ten minutes after you give the signal I'll be on those hills." He was to lead his division in person, and was to be supported by Steele's division. The front was very narrow, and immediately opposite, at the base of the hills about three hundred yards from the bayou, was a rebel battery, supported by an infantry force posted on the spurs of the hill behind. To draw attention from this, the real point of attack, I gave instructions to commence the attack at the flanks.
I went in person about a mile to the right rear of Morgan's position, at a place convenient to receive reports from all other parts of the line; and about noon of December 29th gave the orders and signal for the main attack. A heavy artillery-fire opened along our whole line, and was replied to by the rebel batteries, and soon the infantry-fire opened heavily, especially on A. J. Smith's front, and in front of General George W. Morgan. One brigade (DeCourcey's) of Morgan's troops crossed the bayou safely, but took to cover behind the bank, and could not be moved forward. Frank Blairs brigade, of Steele's division, in support, also crossed the bayou, passed over the space of level ground to the foot of the hills; but, being unsupported by Morgan, and meeting a very severe cross-fire of artillery, was staggered and gradually fell back, leaving about five hundred men behind, wounded and prisoners; among them Colonel Thomas Fletcher, afterward Governor of Missouri. Part of Thayer's brigade took a wrong direction, and did not cross the bayou at all; nor did General Morgan cross in person. This attack failed; and I have always felt that it was due to the failure of General G. W. Morgan to obey his orders, or to fulfill his promise made in person. Had he used with skill and boldness one of his brigades, in addition to that of Blair's, he could have made a lodgment on the bluff, which would have opened the door for our whole force to follow. Meantime the Sixth Missouri Infantry, at heavy loss, had also crossed the bayou at the narrow passage lower down, but could not ascend the steep bank; right over their heads was a rebel battery, whose fire was in a measure kept down by our sharp-shooters (Thirteenth United States Infantry) posted behind logs, stumps, and trees, on our side of the bayou.
The men of the Sixth Missouri actually scooped out with their hands caves in the bank, which sheltered them against the fire of the enemy, who, right over their heads, held their muskets outside the parapet vertically, and fired down So critical was the position, that we could not recall the men till after dark, and then one at a time. Our loss had been pretty heavy, and we had accomplished nothing, and had inflicted little loss on our enemy. At first I intended to renew the assault, but soon became satisfied that, the enemy's attention having been drawn to the only two practicable points, it would prove too costly, and accordingly resolved to look elsewhere for a point below Haines's Bluff, or Blake's plantation.