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 Mississippi 39th Infantry Regiment was organized at Jackson, Mississippi, during the late spring of 1862. About twenty-five percent of this unit was sick in June, and there were 29 officers and 541 men present for duty in July. Company I took part in the fight at Baton Rouge, then, assigned to General Beall's command, the regiment was captured at Port Hudson in July, 1863. After the exchange in December it totalled 220 effectives. Attached to Ross' and Sears' Brigade it was involved in the Atlanta Campaign, Hood's Tennessee operations, and the defense of Mobile. The regiment reported 7 casualties at New Hope Church, 30 at Kennesaw Mountain, 5 at the Chattahoochee River, and 48 in the Battle of Atlanta. Few surrendered with the Department of Alabama, Mississippi, and East Louisiana.

The 29th Mississippi Infantry Regiment 29th Infantry Regiment was organized at Corinth, Mississippi, in April, 1862 with men from Grenada, Lafayette, Panola, Yalobusha, Washington, and De Soto counties. The unit served in Mississippi, then moved to Kentucky where it saw action in Munfordville. Later it joined the Army of Tennessee and was placed in General Walthall's and Brantly's Brigade where it participated in many battles from Murfreesboro to Bentonville. The 29th lost 5 killed and 36 wounded at Munfordville, had 34 killed and 202 wounded at Murfreesboro, and suffered fifty-three percent disabled of the 364 engaged at Chickamauga. It reported 191 casualties at Chattanooga and in December, 1863 was consolidated with the 30th and 34th Regiment and totalled 554 men and 339 arms. This unit reported 5 killed and 22 wounded at Resaca, and in the fight at Ezra Church the 29th/30th lost 8 killed and 20 wounded. Very few surrendered in North Carolina in April, 1865.

The Georgia 4th Cavalry Regiment (AveryÕs) was formed with eleven companies in January, 1863, using Avery's 23rd Georgia Cavalry Battalion as its nucleus. It served for a time with the Conscript Department in Tennessee, then was assigned to J.J. Morrison's, C.C. Crews', and Iverson's Brigade. The regiment participated in the Chickamauga, Knoxville, and Atlanta Campaigns, skirmished in Northern Georgia and East Tennessee, and took part in the defense of Savannah. In January, 1865, the unit was reorganized and called the 12th Cavalry. It went on to fight in the Carolinas and surrendered with the Army of Tennessee. Research of this unit is complicated by the fact that there was another 4th Cavalry (ClinchÕs). No roster of the 23rd Cavalry Battalion or the 4th Cavalry (AveryÕs) has been found. The records are all filed in the state archive microfilm as the GA 12th Cavalry Regiment.

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.