Not to worry, chenzo. Unfortunately, your comment followed BustedChops comments which, IMO, were disrespectful to military musicians. Hopefully we're now moving on to discussing Kenny Dorham or the latest voodoo science as applied to trumpet technology.
To answer your question, Air Force and Navy Bandsmen are full-time musicians. To the best of my knowledge none have acted in combat support roles in any of the recent wars. I can't speak to the Army and Marine musicians, some (not all) of whom are tied more closely to combat support units.