The 27th Arkansas was formed sometime after the Battle of Pea Ridge, March 6/7, 1862.

However, they fought a further down south near Fayettville at the Battle of Prarie Grove in Shaver's Infantry Brigade.

George Martin

27th Regiment, Arkansas Infantry
27th Infantry Regiment was formed during the late summer of 1862 with men from the northern section of the state. It was placed in Colonel R. H. Shaver's and General Tappan's Brigade, Trans-Mississippi Department, and in the spring of the 1864 united with the 38th Regiment. The unit fought at Prairie Grove, Bayou Fourche, and Jenkins' Ferry where the consolidated command reported 4 killed and 22 wounded. It was included in the surrender in June, 1865. The field officers were Colonels Beal Gaither and James R. Shaler, and Lieutenant Colonels A. J. Magenis and James M. Riggs.

Gen. Hindman's report on the battle reads in part:

"Blunt had now formed line of battle 2,000 yards to the front and left of Shoup, and commenced advancing. I ordered Frost's division forward on the left of Marmaduke's. The thick undergrowth on that flank rendered it difficult to execute the movement, which was further embarrassed by the well-directed and determined fire of the enemy's batteries. There was, however, no confusion. By the time Frost's division was in line, the enemy was nearly across the prairie, and our skirmishers engaged his almost as soon as deployed. His attack was directed against Parsons' brigade. It was fierce and prolonged, but ended in his being driven back in disorder with heavy losses. One of Marmaduke's regiments and one of Roane's (both Missourians) shared the honor of this brilliant achievement. The enemy now brought up all his artillery, many pieces of which were rifled, and endeavored to shake our troops by playing upon the entire line for nearly an hour. Then he attacked with all his infantry, at the same time threatening the extreme left with a heavy cavalry force and attempting to turn the right. MacDonald's Missouri cavalry defeated him in the last maneuver. Lane's Texas cavalry and Roane's brigade deterred him from seriously assailing the left, and Shoup's division, Shelby's brigade, of Marmaduke's division, and Parsons' and Shaver's brigades, of Frost's division, gloriously repulsed him in his desperate attacks upon their lines. He again fled beyond the prairie, leaving his dead and wounded, and the colors of several of his regiments, in our hands, besides a number of prisoners. Some of these were ascertained to be of Totten's division, which had arrived upon the field, still further increasing the disparity of forces.

In the midst of this struggle information reached me that a considerable body of Federal cavalry was approaching Hog-eye, to which place I ordered my trains. I directed the wagons retired on the Telegraph road to Oliver's. This was done without loss. A furious cannonade was kept up by the enemy until near sunset; then a last attack of his infantry was directed against the line held by Frost. This was a most determined effort to retrieve the fortunes of the day. It signally failed, and the enemy paid dearly in killed and wounded for the attempt. At dark the battle closed, leaving us masters of every foot of the ground on which it was fought.

Our loss in killed was 164; wounded, 817; missing, 336. The enemy left not less than 400 dead on the field, and his wounded certainly exceeded 1,500. The number of prisoners in our hands was 275, including 9 officers. We also captured 5 Federal flags and over 500 small-arms, with 23 wagons containing clothing and camp and garrison equipage. Invoices of' this property have been forwarded.

Of all the troops engaged on our side, Adams' Arkansas regiment alone dishonored itself. It was well armed, ably commanded, and surrounded by good soldiers from the same State, setting it an example of courage and patriotism; but, after delivering a single fire, the greater part of the men broke ranks, threw down their arms, and shamefully fled, many of them even deserting to the enemy. The field and staff officers who had been appointed rallied about 75 around the colors, and these did much to redeem the reputation of the regiment. With but few exceptions, the company officers exerted no influence. The other troops displayed the greatest courage, constancy, and enthusiasm. There was no place of shelter upon any portion of the field. Wounds were given and deaths inflicted by the enemy's artillery in the ranks of the reserves as well as in the front rank. During five hours, shell, solid shot, grape and canister, and storms of bullets swept the entire ground. Many gallant officers, and many soldiers equally brave, fell dead or wounded, but their comrades stood as firm as iron. Volunteers maintained their reputation. Conscripts rose at once to the same standard, and splendidly refuted the slanders put upon them by the class of exempts.
Generals Frost, Shoup, and Marmaduke, commanding divisions; Generals Roane, Fagan, Parsons, and McRae, and Colonels Shaver and Shelby, commanding brigades, did their duty nobly. I strongly commend them to the lieutenant-general commanding the department. Generals Shoup and Marmaduke do not appear to have been confirmed as brigadiers. They fully merit the honor. Had the authorities, whose consent is requisite, been present at Prairie Grove or at Shiloh, where these gallant officers equally distinguished themselves, the act of confirmation could not be delayed. The reports of the division commanders and their subordinates are forwarded herewith. Especial attention is invited to them. They embody many valuable details and specify instances of courage and good conduct on the part of field, staff, and company officers and enlisted men which I will not be expected otherwise to mention here."