The Tennessee 45th Infantry Regiment was organized at Camp Trousdale, Tennessee, in December, 1861. It participated in the Battle of Shiloh, was active at Baton Rouge, then served in the Jackson area. Later it was assigned to J.C. Brown's, Brown's and Reynolds' Consolidated, and Palmer's Brigade, Army of Tennessee. In November, 1863, it was consolidated with the 23rd Infantry Battalion. The regiment took an active part in the campaigns of the army from Murfreesboro to Atlanta , moving with General Hood back into Tennessee, but it was not engaged at Franklin and Nashville. It ended the war in North Carolina. The unit sustained 112 casualties at Murfreesboro, lost forty-three percent of the 226 at Chickamauga, and reported 12 men disabled at Missionary Ridge. The 45th/23rd Battalion totaled 316 men and 340 arms in December, 1863. Few surrendered in April, 1865.

On August 18, 1862, Col. Edward J. Gurley organized ten companies at Waco, Texas, to form the Thirtieth Texas Cavalry, also known as the First Texas Partisan Rangers. After the outbreak of the Civil War, Gurley obtained permission from President Jefferson Davis to raise a regiment of cavalry. A majority of the men Gurley enlisted in his command came from Waco and the surrounding area, many to avoid the stigma of conscription. Besides McLennan, men came from Bastrop, Johnson, Bosque, Comanche, Chambers, Erath, Hill, and Ellis counties, all in North Central Texas near the frontier, with a small number of men from Arkansas. After the Second Battle of Cabin Creek, the Thirtieth Texas Cavalry received orders that transferred it to Gen. William Henry Parson's Brigade, replacing the Twenty-first Texas Cavalry in March 1865. The Thirtieth Texas Cavalry finally disbanded in May 1865 at Wallace Prairie, Texas, near Austin after serving with Parson's Brigade for only two months.

The Texas 26th Cavalry Regiment was formed in March, 1862, using the 7th Texas Cavalry Battalion as its nucleus. Its companies were from Huntsville, Houston, Lockhart, Galveston, Centerville, and Hempstead, and Leon and Walker counties. Consi-dered to be one of the best disciplined regiments in Confederate service, it was assigned to H. Bee's and Debray's Brigade in the Trans-Mississippi Depart-ment. The unit served along the Rio Grande and in January, 1864, contained 29 officers and 571 men. It was involved in the operations against Banks' Red River Campaign, then returned to Texas where it was stationed at Houston and later Navasota. Here the 26th disbanded in May, 1865.

The Tennessee 18th Cavalry Regiment was also called the 19th Regiment. It was organized in May, 1864, by consolidating six companies of Newsom's Tennessee Cavalry Regiment and four companies of Forrest's Alabama Cavalry Regiment, The unit was assigned to T.H. Bell's Brigade in the Department of Alabama, Mississippi, and East Louisiana. Its members were recruited in Hardeman, Madison, Henderson, and McNairy counties.

The Mississippi 4th Infantry Regiment was organized at Grenada as the Fourth Regiment, Second Brigade, Army of Mississippi, and enlisted for twelve months. The Fourth was among the troops posted at Fort Henry on the Tennessee River, under General Lloyd Tilghman. The troops were transferred to Fort Donelson and there captured. Following exchange they were then surrendered at Vicksburg and continued throughout the remainder of the war in the Atlanta Campaign, Franklin, and Nashville, ending the war in the defense of Mobile.

The Louisiana 12th Infantry Regiment completed its organization at Camp Moore, Louisiana, in August, 1861. Its companies were from the parishes of Caldwell, Claiborne, Vermilion, Cameron, Calcasieu, Jackson, Ouachita, Bossier, and Iberia. Sent to Missouri, the unit was captured at Island No. 10 in April, 1862. After being exchanged, it was assigned to Rust's, Buford's, T.M. Scott's, and Lowry's Brigade. It fought at Champion's Hill and Jackson before participating in the campaigns of the Army of Tennessee from Resaca to Bentonville. In July, 1862, the unit contained 41 officers and 546 men, reported 11 killed, 57 wounded, and 5 missing out of the 318 engaged at Peach Tree Creek, lost many during Hood's Tennessee Campaign, and surrendered with only a remnant on April 26, 1865. Its commanders were Colonel Thomas M. Scott; Lieutenant Colonels James A. Boyd, Wade H. Hough, Noel L. Nelson, and Thomas C. Standifer; and Majors John C. Knott and Henry V. McCain.