f Article 104 of the UCMJ, which provides that [a]ny person who . . . aids, or attempts to aid, the enemy with arms, ammunition, supplies, money, or other things . . . shall suffer death or such other punishment as a court-martial or military commission may direct. 10 U. S. C. ??904. 2 Separate and apart from the offense of joining a contingent of uncivilized combatants who [are] not . . . like