Ia faaauau pea le parakalafa lenei - I le avea ai o le 21st Arkansas Regiment, i lalo o le taʻitaʻiga a le Kolone o Jordan E. Cravens, na tau ai lenei regiment i taua nei: Taua Lona Lua i Korinito, Taua i le Grand Gulf
O le taua i Port Gibson, Battle of Champion's Hill, Battle of Big Black River Bridge, ma na iʻu lava ina faatoʻilaloina i le iʻuga o le Siege of Vicksburg. O le 21st Arkansas na tuufaatasia ma le 15th Northwest Arkansas, 16th Arkansas, ma le Powers' 14th Arkansas Infantry Regiments e fausia ai le 1st Arkansas Consolidated Infantry Regiment (Trans-Mississippi), ma sa i ai i Marshall, Texas, ina ua maeʻa le taua. Na tofia le regiment tuufaatasia faatasi ai ma le 2nd Arkansas Consolidated Infantry Regiment ma le 3rd Arkansas Consolidated Infantry Regiment ma le 2nd (McNair's) Arkansas Brigade, 1st (Churchill's) Arkansas Division, 2nd Corps, Trans-Mississippi Department, mai ia Setema 1864 ia Me 1865.