Hello Ann, Your gggrandfather, James C. Tyson, is listed as having enlisted as a Private on August 9, 1861. He was elected 2d Lieutenant on Sept. 23, 1861 and retired on May 11, 1862. The "Bryan Guards" were 1st Company I, 25th Regiment Georgia Volunteer Company, Army of Tennessee, CSA, Chatham County, Georgia. This company was successively designated as 1st Co. I, and 3rd Co. D. There was also a Thomas Tyson, Private, who enlisted Aug. 9, 1861 and was discharged, over-age, Sept. 3, 1862. Was he a relative as well? Alberta