Easier and cheaper just to KILL them.
If you wanted to make a buck on the deal, make them open season for civilian hunters and put a bounty on them.
A somewhat darker, but more effective approach I did not mention was to use them as “cannibal rats”, that is, reprogram hundreds of them to return home to assassinate the leaders, the instigators, the men of power in their terrorist movement.
The Soviets were so scared that their soldiers could be turned into agents of the West, and quickly, they had a 48 hour rule, that if in a conflict, a soldier was separated from his unit or not accountable under other Soviet military control for just 48 hours, they were to be considered as having been “captured by the enemy and turned”, so they were to be shot. They even told their soldiers about this policy, and the few times it was invoked, ironically, returning absent soldiers said they were aware of it, and returned knowing they would be shot.
This policy began in the 1950s. And mind control tech has advanced right along with other technology since then, though not in the military, as such. Just the pharmacopeia of mind control now includes dozens of drugs that do all sorts of weird things.
Optimally, a “cannibal rat” could have powerful explosives implanted in his body, so even if disarmed, if he just got close enough to his target, it would be enough. He would just push a switch hidden under his skin.
And because such terrorists are utterly reliant on their operatives being out of contact for extended periods, they could no longer trust anyone.