Like I said, they are obscure, but nice.
Whether or not they can be revealed is not my decision.
Let me take a crack at it. One of the things that I remember is that their walls can be upgraded past level 6.
Various regions have preferences for recruitment center types. I'm betting they have a higher than all other region type chance of making special forces, and generally have higher values in training and armor/weapons. Something tells me that the rate they fill up with recruits is also special. Either drafts have little effect on morale or reduced. Higher values of draftees, or higher natural replenishment.
