From 1860 population of 2612 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.