The regiment remained in Murfreesboro until June when it participated in the Tullahoma Campaign, fighting at the Battle of Hoover's Gap. In the early autumn, it participated in the Chickamauga Campaign and the subsequent Battle of Chattanooga. Chickamauga in particular was hard on the regiment, with 183 soldiers killed, wounded, or captured, and 36 men who were taken as prisoners of war later died in the infamous Andersonville prison camp.