I also tried Ballou, Bellow and Ballow. There is a possibility that he was part of the 1st Mississippi Battalon and later a sharpshooter unit. Also look at the 36th Miss. that for a time may have been part of the 1st Miss.,also "State troops" The problem whether in Mississippi or Missouri is most likely a spelling or transcription error. Have census records placed him in Miss. before the war or after?
Any pension applications?