my brother-in-law has talked about his grandpa dykes riding with forrest and being at fort donaldson.I've found where he enlisted at knoxville on march 28,1862 in the 39th regiment tn.mounted infantry co G (Hawkins county) as a sgt. ended the war as a 1st lt.
later his wife,margaret elizabeth was listed as pension #59884. he was john n(sometimes M) dykes and died & buried in christiana,tn.1915.

How can i find more information? thank you