The 3rd Regiment, Tennessee Cavalry (Union) was organized at Murfreesboro and Nashville, Tenn., January 27, 1863. It served primarily in east Tenneseee against Forrest. It was decimated by disease and most of the men were captured in the fall of 1864. The regiment lost during service 2 Officers and 8 Enlisted men killed and mortally wounded and 4 Officers and 532 Enlisted men by disease. Total 546. Companies of the Tennessee 3rd Cavalry Regiment Co. "A." Mustered in at Covington, Kentucky, November 1862. Men from Knox and Blount Counties. Co. "B.." Mustered in at Murfreesboro, January 27, 1863. Co. "C." Mustered in at Murfreesboro, January 27, 1863. Co. "D." Mustered in at Murfreesboro, January 27, 1863. Co. "E." Mustered in at Murfreesboro, January 27, 1863. Co. "F." Mustered in at Nashville, August 31, 1863. Men from 3rd Congressional District. Co. "G." Mustered in at Nashville, August 31, 1863. Men from 3rd Congressional District. Co. "H." Mustered in at Nashville, November 12, 1863. Men from 3rd Congressional District. Co. "I." Mustered in at Nashville, December 14, 1863. Co. "K." Mustered in at Nashville, March 25, 1864. Co. "L." Mustered in at Nashville, June 17, 1864.

The 8th Regiment, Tennessee Cavalry (Union) was organized August, 1863, by consolidation of 5 Companies organized at Camp Nelson, Ky., June 30 to August 14, 1863, for 10th Tennessee Cavalry which failed to complete organization, and 7 Companies organized in Tennessee at large for the 5th East Tennessee Cavalry. There was another 10th Tennessee Cavalry Regiment formed under the command of Col. George W. Bridges. The regiment fought throughout the war in East Tennessee and western Virginia. They were responsible for the destruction of the Confederate Salt Works at Saltville, Virginia. At the end of the war they were sent in pursuit of the Confederate President Jefferson Davis. They may have been part of the Union troops involved in the disappearance of the Confederate Gold at Washington, GA, but there is no record that they were present at the capture of President Davis. Companies of the Tennessee 8th Cavalry Regiment - Company A - - Company B - Company C - Men from Greene, Hawkins and Jefferson Counties. - Company D - Men from Washington, Greene, Hawkins, Hamblen and Cocke Counties. - Company E - Men from Greene, Washington, Carter and Hawkins Counties. - Company F - Men from Greene, Washington, Hamilton, Union, Knox and Carter Counties. - Copmpany G - Some men from Grainger, Knox, Claiborne, Greene, Sullivan and Union Counties. - Company H - - Company I - - Company K - - Company L - - Company M -

The 3rd Regiment, Tennessee Infantry (Union) was organized at Flat Lick, Ky., December, 1861, to February, 1862. Its first battles were at Cumberland Gap and it continued throughout the war in Tennessee and the Atlanta Campaign. It was mustered out after Nashville, so did no participate in the Carolinas Campaign. Companies of the Tennessee 3rd Infantry Regiment George W. Hutsell, Benjamin I. Bingham Co. "A." Thomas McNeish Co. "B." James R. McBath, John H. Cross Co. "C." John 0. Keeffe Co. "D." Enlisted men generally from Knox County. John C. Slover Co. "E." James L. Ledgerwood Co. "F." Enlisted men generally from Knox County. Henry G. Hodges Co. "C." Enlisted men generally from Blount County. James W. Adkerson (Adkisson), James G. Roberts Co. "H." Enlisted men generally from Knox County. Eli D. Willis, Washington L. Ledgerwood Co. "I." Enlisted men generally from Knox County. William M. Sawyers, William C. Haworth Co. "K."

The Tennessee 9th Cavalry Regiment was organized at Camp Nelson from East Tennessee refugees in the early part of 1863, with Joseph H. Parsons, of Knox county, as colonel. It assisted in the capture of Cumberland gap, after which it escorted the prisoners to Lexington, Ky. Returning to Knoxville, it remained there until after the siege of that place, and was then detailed to escort prisoners to Camp Nelson, from which place it was ordered to Nashville, where it arrived in January and remained until about May 1st. It was stationed at Gallatin from that time until August, when it was constituted a portion of the brigade known as the "Governor's Guards," under the command of Gen. Gillem, which then entered upon a campaign in East Tennessee. It participated with great gallantry in all the battles of that campaign, and at Bull's gap a large portion of the regiment was taken prisoners. A large part of the 11th cavalry having also been captured it was consolidated with the remainder of the 9th. On March 21, 1865, it entered upon the raid through Virginia, North and South Carolina and Georgia under Gen. Stoneman. It returned to Tennessee in May and was mustered out at Knoxville in Sept., 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 Tennessee 12th Cavalry Regiment [also called 1st Partisan Rangers] was organized behind Federal lines in February, 1863. The men were from the counties of Fayette, Tipton, Shelby, Haywood, and Gibson. It served R.V. Richardson's and Rucker's Brigade, confronted the Federals in Tennessee and Mississippi, and in October totaled about 300 effectives. Later it was active in Georgia, fought at Memphis, then was part of Hood's operations in Tennessee. During February, 1865, the regiment was broken up. Some of its members became part of the 3rd (Forrest's Old) Tennessee Cavalry. Companies Of The Tennessee 12th Cavalry Regiment Co. ""A"". Fayette County. Co. ""B"". Fayette County. Co. ""C"". Tipton County. Co. ""D"". Shelby County. Co. ""E"". Shelby County. Co. ""F"". Fayette County. Co. ""G"". Tipton County. Co. ""H"". Fayette County. Co. ""I"". Haywood County. Co. ""K"". Fayette County.

The history of this unit is very complex because over seventy companies from Tennessee, Kentucky, Texas, Mississippi, and Louisiana were attached to it at one time or another. The 3rd Tennessee (Forrest's Old) Cavalry Regiment was organized at Memphis, Tennessee, in October, 1861, as an eight-company battalion. In January, 1862, it was increased to regimental size. When the mass Confederate breakout attempt at Fort Donelson failed, Forrest led most of his own men, and some other troops, through the besieging lines and then directed the rear guard during the retreat from Nashville. The regiment fought throughout the war in Tennessee, Alabama, Georgia, and Kentucky. As first organized the regiment was composed of Capt. Overton's Company (A), Brandenburg, Ky., some ninety men; Capt. Logan's Company (G), Harrodsburg, Ky., forty-five men; Kelley Troopers (Company F), Madison county, Ala., ninety men; Capt. Trewhitt's Company (E), Gadsden, Ala., eighty men; Capt. Bawl's Company (B), South Alabama, eighty men; Capt. Miner's Company (PI), Marshall county, Ala., eighty-five men; Capt. Gould's Company (D), Texas, ninety men; and Capt. May's Company (C), Memphis, Tenn., ninety men. Later it became by degrees almost entirely a regiment of West Tennessee troops.