supervision of officers not a part of the company is a responsibility of the officers concerned. During marches, the company commander commands the regimental motor column, which consists primarily of regimental trains (less detachments) together with any company transport under regimental con- trol. In combat, he is charged with the establish- ment, defense, and operation of the regimental train bivouac, and controls all installations and personnel therein. This duty is performed under the super- vision of the regimental supply officer when the trains are under regimental control, and under the supervision of a designated representative of the di- vision commander when the regimental trains are under division control.
(c) A warrant officer, supply, administrative, usually functions at the regimental command post and performs such duties as are assigned by the regimental supply officer.
(d) The first sergeant is in charge of enlisted personnel of the command group. He assists the company commander in the interior administration of the company and in the control of its several ele- ments.
(e) The bugler and messenger are trained as ob- servers, truck drivers, and messengers. In combat one accompanies the company commander, the other accompanies the regimental S-4. They assist as di- rected in observation and control, and perform such other duties as may be assigned.