this is more or less exactly what the spawn condition system was designed to facilitate. You can mark each camp/race combo with its own spawn condition, and then use quests to handle the "special forces" stuff and determining victory (counting kills or something) and manipulating the spawn conditions based on the outcome.
Im pretty sure that there are already a bunch of invisible "controller" NPCs in that zone which would prolly be the best way to determine victory. When people spawn or die, they signal the controller NPCs which can keep track of the "global" view. (be careful during zone boot if you do this to make sure the controller exists before spawning anything else, or they may not get all your spawn signals)
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