Cpl. Platt retained his rank with the 7th Ga Cav. He was captured June 11, 1864 during the Battle of Trevillian Station. Platt was sent to Fortress Monroe June 20th and on July 25, '64 was transferred to Elmira Prison, N.Y.
On June 14, 1865 he was released and paroled at Elmira. At the time his description was as follows: residence, Morristown, N.J.; complexion, fair; hair, light; eyes, blue; height, 5 feet 10 inches.