> The Tribunal affirmed his status as an enemy combatant, ...
How about as an ILLEGAL enemy combatant, which is rather
a different thing altogether.
AFAIK, "enemy combatant" is the extent of the term used, and it connotes a status that can be used (but is not necessarily used) to keep a person out of the apparatus we know as Article III Courts.
Or put anther way, all enemy combatants are subject to incarceration and punishment by the capturing government.
I'm curious what you envision as a "legal enemy combatant," in contrast to your proposed label, "illegal enemy combatant."