Tenn. Code Ann. § 58-1-408

The governor may organize, activate, increase, change, divide, consolidate, disband, reactivate or reorganize any unit, headquarters, staff or cadre of the state guard, and may prescribe the composition and types of units, the type of organization and the system of drill or instruction to be used in training such units; and for such purposes the governor is authorized to fix, increase or decrease the strength of any unit, headquarters, staff or cadre of the state guard, including the number of commissioned officers, warrant officers, noncommissioned officers and other enlisted personnel of any grade in any such unit, headquarters, staff or cadre, and to alter the grades of officers, warrant officers and noncommissioned officers.