I would stay away from the mobile style. Where could they go? Really? They just scream, "Top Secret Military force coming through!"

For my fanfic the Pitt is in middle America, it's underground. Above it is an army base, a Reserve base to be specific, this way military traffic and the like don't draw any extra attention. I have a motorpool, DFAC, barracks, firing range / armory, gym, com center, infirmary, R&D dept., various offices and meeting rooms, and several escape tunnels.

I don't see the Joes as having an underground ocean or any of that nonsense.

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