P.A.I. and CC.RR. are part of the R.E. and should be discussed in that section (or the appropriate theater). Polizia di Stato are political and not the focus of CS. If there are questions/discussions of P.S. that touch on military matters, they should be asked/discussed in the appropriate section. For example, a discussion of the role of the P.S. in the defense of Rome in Sep 43 should be asked in that thread.