Drawn, hung, and quartered. With the parts hoist in the air at the corners of the realm (define that any way or where you want) to for the crows to finish off.
[Hmmm. How many basic training centers does the Army have? If 5 or less the parts could be hoist over the main gate at each one.)
A small number of Nazis at the Nuremburg trials were found guilty of criminal acts that did not rise to the level of crimes against humanity. They were shot. Those that were guilty of crimes against humanity and did not commit suicide were hung. If I remember my history Goering asked for his sentence to be changed to being shot "as it was an honorable soldier's death". When told "No" he swallowed cyanide. Several Japanese officers found guilty of crimes against humanity asked to be allowed to commit sepeku. They were also hung.
stay safe.
Army Basic Training posts, there are four: Ft. Jackson, SC; Ft. Benning, GA; Ft. Leonard Wood, MO; and Ft. Sill, OK. There are other posts that have AIT, but these four are the only BCT posts. So he could easily be drawn and then quartered. However, that, sadly, is not a proscribed punishment available to a Courts Martial.
Death by firing squad is though.