An Army and Marine captain generally commands company-sized units. When given such a command, they bear the title company commander. Captains also instruct at service schools and combat training centers and are often staff officers at the battalion level. Marine captains also serve as officer selection officers, commanding recruiting stations for commissioned officers. MARSOCs fourteen man Marine Special Operations Teams (MSOT) and U.S. Army Special Forces Operational Detachments Alpha are commanded by a captain.