 They served as mounted infantry as a part of Colonel Thomas Pleasant Dockery's Brigade during the Camden Expedition in the Spring of 1864.As part of Dockery's Brigade, remnants of the regiment saw action at the Battles of Prairie D'Ane, Marks' Mills, and Jenkins Ferry.In the summer of 1864, the survivors of the 12th Arkansas were consolidated with the remains of several other regiments surrendered at Port Hudson or at the Siege of Vicksburg and formed into the 2nd Arkansas Consolidated Infantry Regiment.