After going over your list, I am puzzled to find none of the Ross Texas Cavalry Brigade buried in GA. Those of the 1st, 6th and 9th on your list are all Infantry. I do know of one cavalry soldier buried in Rome area, but not during the war. My GGF's brother a Private in Company I, 6th Texas Cavalry Regiment is buried in the Cedar Creek Cemetery near Cave Springs. (b. 1 Sep 1842-d. 25 Sep 1906). Cause not known. His daughter married a doctor from Cave Springs. The brigade fought from Rome to Atlanta and back again. Was very involved in the interdiction of the McCook and Kilpatrict Raids at the end of the Atlanta campaign, so fought all over the Marietta area. Most likely the brigade recovered their dead and reburied them in Texas. This is just a wild guess. Units involved
Ross Texas Cavalry Brigade, Jackson's Division
27th Texas Cavalry Regiment (Aka 1st Texas Legion)
3rd Texas Cavalry Regiment
6th Texas Cavalry Regiment
9th Texas Cavalry Regiment