For an offense like this ... General Court Martial
I'd just give him to the other soldiers for target practice or perhaps demonstration of napalm on human skin trials.
In certain Far Eastern locales, a method of execution was to take a length of bamboo long enough to reach from the person's foot to his navel. You sharpen one end, insert into rectum, place other end into hole in ground, attach subjects feet to stakes on either side.
You then see how long he can stand up.
809. ART. 90. ASSAULTING OR WILLFULLY DISOBEYING SUPERIOR COMMISSIONED OFFICER.
Any person subject to this chapter who--
(1) strikes his superior commissioned officer or draws or lifts up any weapon or offers any violence against him while he is in the execution of his officer; or (2) willfully disobeys a lawful command of his superior commissioned officer; shall be punished, if the offense is committed in time of war, by death or such other punishment as a court-martial may direct, and if the offense is committed at any other time, by such punishment, other than death, as a court-martial may direct
894. ART. 94. MUTINY OR SEDITION
(a) Any person subject to this chapter who--
(1) with intent to usurp or override lawful military authority, refuses, in concert with any other person, to obey orders or otherwise do his duty or creates any violence or disturbance is guilty of mutiny;
(2) with intent to cause the overthrow or destruction of lawful civil authority, creates, in concert with any other person, revolt, violence, or disturbance against that authority is guilty of sedition;
(3) fails to do his utmost to prevent and suppress a mutiny or sedition being committed in his presence, or fails to take all reasonable means to inform his superior commissioned officer or commanding officer of a mutiny or sedition which he knows or has reason to believe is taking place, is guilty of a failure to suppress or report a mutiny or sedition.
(b) A person who is found guilty of attempted mutiny, mutiny, sedition, or failure to suppress or report a mutiny or sedition shall be punished by death or such other punishment as a court- martial may direct