From the ADAH Website;

3rd Alabama Infantry Battalion, Reserves

The 3rd Alabama Infantry Reserves Battalion was organized in August of 1864 and assigned to the District of the Gulf, Dept. of Alabama, Mississippi and East Louisiana, in first Liddell's, then Withers', and finally Clanton's Brigade. The battalion was consolidated with the 4th Alabama Infantry Reserves Battalion in March of 1865 and designated as the 65th Infantry Regiment.

Field Officers: Lt. Col. Edward M. Underhill (1842-1904; promoted Col., 65th AL); Major E. T. Starke