Could he be Pvt. Ransom Fife, (1st) Company B, Moorman's Battalion of Cavalry,*

* This company was formerly a part of Capt. Robert's Company Mississippi Artillery, and subsequently became (2d) Company D, Moorman's Battalion Mississippi Cavalry

...

F. Fife, Pvt., Capt. Calvit Roberts' Company Artillery,**

** This company was broken up in February, 1864, and the men formed into three companies which became Company C, (2d) Company D, and Company E, Moorman's Battalion Mississippi Cavalry