From the link in xone’s post:
“...Unlawful Combatants.
Unlawful combatants are individuals who directly participate in hostilities without being authorized by governmental authority or under international law to do so.
For example, bandits who rob and plunder and civilians who attack a downed airman are unlawful combatants.
Unlawful combatants who engage in hostilities violate LOAC and become lawful targets.
They may be killed or wounded and, if captured, may be tried as war criminals for their LOAC violations. ...”
Could Antifa thugs be considered bandits, due to the mayhem they commit?
Or if they attack a military person, be put in the unlawful combatant category on account of that action?
There -is- a continuing state of emergency, thus the LOAC applies.
Question is, can it apply to within these United States ?
According to case law, no. Lincoln tried this and the US Supreme Court said no. OK, that was during and after the civil war. We are not in a civil war (perhaps a cold civil war, but we don't have States in secession, armies on the field, cities undergoing siege, etc.
Therefore there is zero reason for using military tribunals in the USA, or against US Citizens arrested abroad, who can be brought back here to face civilian trials.
To do so would pose a huge risk of illegitimacy to any proceedings undertaken that way.