Mo. Rev. Stat. § 40.085

In the state military forces any person authorized to convene a general court-martial, the commanding officer of a garrison, fort, post, camp, station, air base, auxiliary air base, or other place where troops are on duty, or of a brigade, regiment, wing, group, separate battalion, separate squadron, or other detached command, may convene special courts-martial. When any such officer is an accuser, the court shall be convened by superior competent authority and may, in any case, be convened by such authority when deemed advisable by him.