Here's a good candidate for McKinney. George W. McKinney born 2/24/1846 in Upson Co. Ga. Enlisted 3/15/1863 at Talbot, Ga. in the 2nd Ga State Guard Cav. Transferred to 12th Ala Cav Co G on 1/31/64, which date matches up pretty well with the orders for organization from a battalion to a regiment. He died 1/31/1931 in the Confederate Soldiers Home in Atlanta.