 The regiment's designation has caused problems for historians attempting to research the unit.Although Col. John B. Cocke commanded "Cocke's Regiment" for only three months, and the historically accurate designation should be "39th (Johnson's-Hawthorn's-Cocke's) Infantry Regiment or the 6th Trans-Mississippi Rifle Regiment, and Hailey's, Perkins' and Tumlinson's independent cavalry companies, historians have adopted "Cocke's Arkansas Regiment.