| Company A - The Rock City Guards | Company F - The Railroad Boys |
| Company B - The Rock City Guards | Company G - The Brown Guards |
| Company C - The Rock City Guards | Company H - The Maury Greys |
| Company D - The Williamson Greys | Company I - The Rutherford Rifles |
| Company E - The Tennessee Riflemen | Company K - The Martin Guards |
The 1st Tennessee fought at Shiloh and Corinth and arrived at Harrodsburg, Kentucky on October 6, 1862. The regiment suffered heavy casualties in the Battle of Perryville on October 8, 1862, losing more than half of its men in killed, wounded, and missing. As part of General Bragg's army retreated into Tennessee, reaching Murfreesboro in November, 1862, it was again heavily engaged at the Battle of Mufreesboro, December 31, 1862.
It remained in camp around Shelbyville till July,1863, when the army retreated to Chattanooga. There was little activity until the Battle of Chickamauga, September 18 - 20, 1863, where the regiment did valiant service. The regiment also participated in the Battle of Missionary Ridge and helped cover the retreat to Dalton, Georgia, which it reached November 27, 1863.
In February, 1864, again in Cheatham's Division, the regiment was ordered to Missisippi to reinforce General Leonidas Polk, but after reaching Demopolis, Alabama it was returned to Dalton, Georgia. At Resaca, Georgia, May 16, Maney's Brigade was attached to General A.P. Stewart's Division, but was in Cheatham's Division again on the 17th at Adairsville, Georgia. It held the famous "Dead Angle" in the Battle of Kennesaw Mountain June 27. Just prior to the Battle of Peachtree Creek, General Johnston was relieved of his command of the army and was replaced by General John B. Hood. With the army's defeat at Jonesboro on August 29th, Atlanta’s fate was sealed, and Hood ordered the evacuation of the Army of Tennessee. The evacuation was completed on September 2, 1864. Hood’s forces retreated through Lovejoy’s Station, and into rural Georgia. The regiment went with Hood back to Tennessee, taking part in the Battles of Franklin and Nashville, in November and December, 1864.
After the defeat in Nashville, the army fell back across the Tennessee River, and the regiment halted at West Point, Mississippi for a short while. The last battle was the Battle of Bentonville in North Carolina and after the battle the regiment was surrendered by General Joe Johnston on April 26, 1865. The 1st Tennessee was paroled at Greensboro, North Carolina May 1, 1865. Out of nearly 1200 men on the rolls of the 1st Tennessee, only 125 officers and men were left at the final surrender.