Benjamin Hardin was a Union Soldier with the 44th Regiment, United States Colored Infantry. He had reached the rank of Corporal when he mustered out at the end of the war.
44th Regiment History: Post and garrison duty at Chattanooga, Tennessee, until November, 1864. Action at Dalton, Georgia, October 13, 1864. Battle of Nashville, December 15–16. Pursuit of Hood to the Tennessee River December 17–28. Post and garrison duty at Chattanooga in the District of East Tennessee, and in the Department of Georgia until April 1866.
The regiment was captured at Dalton, Georgia. Although the white officers were soon paroled, approximately 250 enlisted men were returned to their former owners. Another 350 enlisted men were pressed into Confederate service as engineer labor in Mississippi. By December 1, 1865, only 125 of these men were still alive. Col. Johnson returned to Tennessee as soon as he was able and recruited again for the regiment, mustering approximately 300 men.