Ken the CWS&S gives Cav. not Inf.

G.P. Holcomb (First_Last)
Regiment Name 2 Mississippi Cavalry
Side Confederate
Company B,D
Soldier's Rank_In Corporal
Soldier's Rank_Out Private

Company B -- Newton Rangers (raised in Newton County, MS)

Company D -- Senatobia Opposers (raised in Panola County, MS)

This is about all I can find without a first name.

GP