United States Army - Battalion Command, Sergeant Major, (CSM) - T Shirt - PremiumCommand Sergeant Major (CSM) Duty Descriptions. Command Sergeant Major of a 250 Soldier Medical Battalion comprised of a Headquarters and Headquarters Detachment, a Medical Company Area Support (MCAS), and Medical Company Ground Ambulance (MCGA); advises the Commander on enlisted matters; sets standards and enforces policies, regulations, and directives; is the extension of the Commander's intent, vision, and execution of the mission; responsible for