Next random question, if I may.
I don't really "see" PD? I tend to buy 20. Are they there immediately, but I can't see them unless attacked, and then only in battle? Do they slowly "develop" --- occasionally I've seen a few odd units apear that I don't recall building, I think, but never like 20. If I take those out, am I taking the PD I bought? Does it regrow? That kind of thing... ?
