[TADSLOS]

It's my understanding that once existing stocks of Halon are gone/used up, the military (and anyone/anything else using it) will have to find an alternate. More greenie-weenie nonsense, as it is a flourocarbon or whatever. For aircraft at least, nothing else comes close in effectiveness at this time

True statement. Even the ones on the flight line are being replaced or already have been. The Army has purchased portable foam stlye extinguishers that are quite effective on aircraft fires. I can't speak to what armored vehicles are using as a replacement.

[Freedom4US]

The problem isn't just the extinguishers on the flightline though, the Black Hawk, for example, uses 2 firebottles for suppression, either manually discharged or crash sequence triggered via accelerometers.