The 40th Infantry Regiment was organized during the fall of 1861 and raised its companies in Bartow, Calhoun, Gordon, Whitfield, Paulding, and Haralson counties. It moved to Tennessee, then Mississippi, and was placed in Barton’s Brigade, Department of Mississippi, and East Louisiana. The 40th participated in the conflicts at Chickasaw Bayou and Champion’s Hill and was part of the garrison surrendered at Vicksburg on July 4, 1863. After being exchanged it was attached to General Stovall’s Brigade, Army of Tennessee, served on many battlefields from Chattanooga to Nashville, and ended the war in North Carolina. The regiment reported 36 casualties at Chattanooga, totaled 223 men and 105 arms in December, 1863, and had 74 effectives in November, 1864. It surrendered on April 26, 1865. The field officers were Colonel Abda Johnson, Lieutenant Colonel Robert M. Young, and Major Raleigh S. Camp.