S.B. Wallace enlisted May 15, 1862 in Savannah with Capt. Miller. Pvt. Wallace served in Co. C, 21st Battalion, Georgia Cavalry until, through consolidation of units, he was transferred to Co. B, 7th Regiment, Georgia Cavalry.
Pvt. Wallace was present on roll calls until June 1864. During the Battle of Trevillian Station he was killed in action on June 11th.