The UCMJ prohibits doing anything to the dead, so any 'believers' on our side better stick to high tech and real-time digital magic. Bill Donovan and that old time crowd could have better exploited the potential use of ju-jus and skin changers than we of today can due to the political oversight that guides and directs any engagements we enter into. Guzman from the Shining Path was pretty much considered a Shaman by the locals and we know Noreiga from Panama was heavily into Santeria/Lukumi. 2cd hand reports suggest Che adapted Bolivian ritual magic to wow peasants from time to time and Bustos, one of his henchman, is reported to have been heavily into Santeria. The Jinn are not readily exploitable in the Islamic theatre of operations IMHO because Mohammed didn't employ/exploit them and Islam pretty much tells its followers to ignore the Jinn.