His name appears (twice) in the Civil War Soldiers and Sailors Database. The same source that I previously cited states that James Peter Coladen Belvin enlisted as a private in Company K, 11th Georgia on 3 July 1861. He advanced to sergeant and was promoted to 2nd Lieutenant in Nov 1861. He was wounded at Antietam, but recovered to serve at Fredericksburg, Gettysburg, Missionary Ridge, and Knoxville. He was promoted to Captain of Company K, 11th Georgia on 7 October 1864, and appears on a 1 March 1865 muster as "absent with the indulgence of General Lee." He supposedly had been sent to find supplies and was accompanied by about half a dozen other men when Lee surrendered. They hurried to Appomattox, obtained their paroles, and started home. A brother, Thomas Sumpter "Sumpt" Belvin, enlisted in Company C of Ramsey's 1st Georgia Regiment on 18 March 1861, and reenlisted in Company K, 11th Georgia to be with his brother. Sumpt was captured in late June 1863 during the Pennsylvania campaign and died at Fort Delaware on 16 May 1864. He was reinterred after the war to the cemetery behind the Methodist church in Marshallville, Georgia.