The database for that system is a bag of worms. JBLM's 14C system is seperate from the USN/USMC 14C system in the region; you can see this for yourself by looking at the control channel neighbor broadcasts.
The JBLM system is 4 sites, 1-3 at Lewis and 9 at McChord, P25 exclusive.
The DoD system has the MP's, fire/ems, gate guards, range control, Grey AAF maintenance units, as well as other miscellaneous base ops TGID'S. I have a fairly extensive list of TGID's from unattended logging in pro96com if you want them. (Once you get a digital scanner of course) Hope this helps!