From 1860 population of 2,612 came more than 100 Civil War soldiers, one an infantryman on a crutch: M.K. Simons, a Mexican War amputee, Brigade Quartermaster, 2nd Texas Infantry, C.S.A.
Officers included Capt. C.L. Owen, veteran of the Texas Revolution and Mexican War, killed at Shiloh in 1862.
Composed chiefly of Jackson County men were Co. D, 1st Texas Cavalry; Co. K, 2nd Texas Infantry; and Co. M, 27th Texas Cavalry (Whitfield's Legion). Jackson men were also in other units, including Confederate Marines and Terry's Texas Rangers, and saw much of war's greatest action.