Forgive my error re: 54th Ill vs 54th OH. Thanks Alan for sharing the Chalmer's and Stuart Reports.

The following excerpt from Chalmers report mentions the federal units:

Sunday April 6, 1862

"In this order we commenced the march early on the morning of the 6th. The space between Owl and Lick Creeks was about a half mile narrower where we first deployed our line of battle than it was in front of the enemy's line, and as the space between General Gladden's left and Lick Creek increased as we advanced, it became necessary that my brigade should move up into the front line, on the right of General Gladden, which was done, and being now in the front line, skirmishers from each regiment were at once thrown forward.
In obedience to orders from General Withers the right of this brigade was advanced by a gradual left wheel, so that when we first encountered the enemy we were marching in a northeast direction, and met him in line of battle in front of his first encampment on our right.
When we arrived in sight our line of battle was formed, and the brigade moved steadily forward in the following order: The Tenth Mississippi Regiment, in command of Col. R. A. Smith, on the right; the Seventh Mississippi Regiment, Lieut. Col. H. Mayson, commanding, second; the Ninth Mississippi Regiment, Lieut. Col. W. A. Rankin, third; the Fifth Mississippi, Col. A. E. Fant, fourth; the Fifty-second Tennessee, Col. B. J. Lea, on the left, and Gage's battery of light artillery in the rear."

First Fight
"When within about 150 yards of the enemy the line was halted and a heavy firing ensued, in which a number of our men were killed and wounded, and Colonel Lea and Maj. T. G. Randle, of the Fifty-second Tennessee Regiment, lost their horse". "

Second Fight-Charge Bayonets
"After several rounds were discharged the order to charge bayonets was given, and the Tenth Mississippi Regiment (about 360 strong), led by its gallant colonel, dashed up the hill, and put to flight the Eighteenth Wisconsin Regiment, numbering nearly 1,000 men. The order to charge having been given from the right flank, where I was then stationed, was not heard down the line, and consequently the Tenth Mississippi moved alone in the first charge, though it was quickly followed by the Ninth and Seventh Mississippi, when the whole line of the enemy broke and fled, pursued by these three regiments through their camps and across a ravine about half a mile to the opposite hill, where they were halted by command of General Johnston.

The Fifth Mississippi and Fifty-second Tennessee, having been left behind in the charge, were moved up to their positions, and the Fifth Mississippi was now placed next to the Tenth Mississippi."

Fall Back
"The enemy was re-enforced and drew up in our front, supported by a battery of artillery and some cavalry. We were about to engage them again, when we were ordered by General Johnston to fall back, which was done.

The enemy, supposing we were in retreat, fired several volleys of musketry at us, whereupon we faced about, returned their fire, and they ceased firing. Being commanded to remain here until we should receive further orders, we rested about half an hour, when a guide (Mr. Lafayette Veal) was sent to conduct us still farther to the right, where we learned that the enemy were attempting to turn our flank."

Right Flank Movement
"Moving by the right flank, we filed to the right, directly south, until we recrossed the ravine behind us, and when we reached the summit of the opposite hill we moved in a southeast direction until our right rested upon the edge of Lick Creek bottom. Here again we were ordered to rest, which we did for some half hour, when we again started forward. "

52nd Tenn Broke and Ran
A few skirmishers of the enemy, having secretly advanced close to our left, fired upon the Fifty-second Tennessee Regiment, which broke and fled in most shameful confusion. After repeated efforts to rally it this regiment was ordered out of the lines, where it remained during the balance of the engagement,”

Exceptions-52nd Tenn.
with the exception of two companies, Capts. J. A. Russell and A. N. Wilson, who, with their commands, fought gallantly in the ranks of the Fifth Mississippi Regiment.”

Forward to Pittsburg Landing
“When the orders were received from General Withers to move on, skirmishers were thrown out in front of the whole line, and placed in command of Maj. F. E. Whitfield, of the Ninth Mississippi Regiment, who led them with great coolness and with marked ability and skill. Our orders were to swing around, with our right resting on the creek bottom, and to drive the enemy before us toward Pittsburg, and we accordingly moved forward, advancing most rapidly on the right and gradually wheeling the whole line.

Third Engagement-Orchard at Hamburg-Pittsburg Road
“In this order we were marching when our skirmishers developed the enemy concealed behind a fence, in thick undergrowth, with an open field or orchard in his front. The width of this orchard was about 350 or 400 yards, and behind it was a very steep and perfectly abrupt hill, at the foot of which ran a small branch.
At the base of this hill ran the Hamburg and Pittsburg road, skirting the orchard at its base and then turning to the right running alongside of it, the orchard being to the right of the road. The ground from the branch to the fence, where the enemy was concealed, was a gradual ascent, and our line was in full view of the enemy from the time it crossed the stream.
The Ninth Mississippi was now on the left, and there was a space of about 30 yards between its left and the Hamburg and Pittsburg road. As soon as I discovered the position of the enemy I ordered up Gage's battery, which until now had not been engaged, and put it in position on the hill above the branch.
My line moved on across the orchard in most perfect order and splendid style, and to my great surprise not a shot was fired until we came within about 40 yards of the fence, then a heavy fire was opened on us in front, and at the same time a column was seen coming at double-quick down the Hamburg and Pittsburg road, with the evident intention of getting in our rear and cutting off the whole brigade.”

Second Charge of the Day
“As soon as this column was fairly in sight, coming over the opposite hill, Gage's battery opened a well-directed fire on its head, and it was scattered in confusion, and at the same moment our infantry made a charge in front, and after a hard fight drove the enemy from his concealment, though we suffered heavily in killed and wounded.

After this fight our ammunition was exhausted, and, the wagons being some distance behind, we lost some time before it was replenished. As soon, however, as the ammunition could be distributed we moved on, with the right resting on the edge of the Tennessee River bottom, with the same orders as before.”

Fourth Fight
When we had gone about a quarter of a mile we again encountered the enemy in a strong position on a hill with a deep ravine in his front, and a very stubborn fight ensued, in which we lost many gallant men, among them the Rev. M. L. Weller, chaplain of the Ninth Mississippi Regiment, a pure man and ardent patriot and a true Christian, and Capts. R. J. Armstrong and T. C. K. Bostick, of the Fifth Mississippi Regiment, who fell gallantly leading on their respective companies.
Here again Gage's battery did good service, though it was some time before it could be brought into position, owing to the rough nature of the ground and the want of roads, and I here take occasion to say that I cannot speak too highly of the energy, skill, and labor displayed by the men of this battery throughout the day in cutting their way through a thickly-wooded country over ravines and hills almost impassable to ordinary wagons. After about an hour's hard fighting the enemy again retreated, learning many of his dead on the field.

Fourth Fight-Third Charge

About this time the gunboats from the river began to throw their shells among us, and we pressed rapidly forward in line of battle toward the center, where the battle seemed to be raging fiercely. We were soon met by an officer, stating that he belonged to General Crittenden's staff, and that he had been hotly engaged with the enemy and needed assistance. As near as I could judge of the position of affairs our troops were then in a line of battle running from south to north, and facing east, or a little north of east. My line was running from east to west, and facing north. Moving at a double-quick, over several ravines and hills, we came upon the enemy and attacked him on his flank. This was the fourth fight in which my brigade had been engaged during the day, and after a severe firing of some duration, finding the enemy stubbornly resisting, I rode back for General Jackson's brigade, which was lying down in reserve in my rear and to my left. I did not see General Jackson, but finding Colonel Wheeler, called upon him to take up the fight, which he did with promptness and vigor.

Rest Stop-Nope

“I sent a staff officer to command my brigade to lie down and rest until they received further orders, and then followed up General Jackson's brigade myself until I came upon Major-General Bragg, commanding in the thickest of the fight, to whom I reported my action. I had been there but a few minutes, however, when some of our troops were driven back in confusion, and General Bragg called out to "bring up Chalmers' brigade."

Fifth Fight-Fourth Charge-Taking the Camps
“I rode back immediately to where I had ordered my men to halt, and found that they had not understood the orders and had pressed on after the retreating foe. Riding rapidly after them, I reached them just after the enemy had raised the white flag and a number of the enemy had surrendered to the Ninth Mississippi, which was then some distance in advance of any other Confederate troops.
Colonel Shaw, of the Fourteenth Iowa Regiment, and a senior captain, commanding some companies of the Twenty-eighth Illinois Regiment, surrendered to Maj. F. E. Whitfield, and the colonel of the Eighteenth Missouri, with a portion of his command, surrendered to Lieut. Donald McKenzie, Company K, Ninth Mississippi Regiment.

About a quarter of an hour after the surrender some of our troops, supposed to be of General Polk's division, made their appearance on the opposite side of the surrendered camps, and were with great difficulty prevented from firing upon the prisoners. The cavalry very soon arrived, and the prisoners were turned over to them and were carried to the rear.”

Sixth Fight-Fifth Charge

“It was then about 4 o'clock in the evening, and after distributing ammunition, we received orders from General Bragg to drive the enemy into the river. My brigade, together with that of Brigadier-General Jackson, filed to the right and formed facing the river and endeavored to press forward to the water's edge, but in attempting to mount the last ridge we were met by a fire from a whole line of batteries protected by infantry and assisted by shells from the gunboats. Our men struggled vainly to ascend the hill, which was very steep, making charge after charge without success, but continued to fight until night closed hostilities on both sides. During this engagement Gage's battery was brought up to our assistance, but suffered so severely that it was soon compelled to retire.

This was the sixth fight in which we had been engaged during the day, and my men were too much exhausted to storm the batteries on the hill, but they were brought off in good order, formed in line of battle, and slept on the battle field, where I remained with them."