Welcome aboard, Allen!
I've spent some time at Ft Bragg, but only a little. I am a Marine at Camp Lejeune and when I served with 10th Marines (as an artillery officer and latter as the regimental communications officer) we spent about 3 weeks up there every spring and fall. I don't know when they first started doing that but I know they were doing it in the 80's. No doubt you remember being annoyed by all of the Marine artillery going off at all times of the night!
The Marines have an airfield firefighting MOS (7051) but not a "combat firefighting" MOS. I would be interested to see what it was that you were trained to do. Large battle normally cause many fires, and even smallscale firefights can given the right conditions. How far forward were you expected to go forward?
Once again, welcome aboard.