28th Infantry Regiment, originally known as McRae's Emergency Regiment and also called 2nd Trans-Mississippi Regiment, was organized on June 26, 1862. Colonel Dandridge McRae, Lieutenant Colonel John E. Glenn, and Major W. S. Hanna were in command. During the reorganization of the 1st Corps, Army of the Trans-Mississippi, following the Battle of Prairie Grove, the unit was redesignated as the 36th Arkansas Infantry Regiment.