The A.R.M.O.R. Men were five men that worked for A.R.M.O.R.(Advanced Radical Military Occult Railroad) They went inside a portal to the ghost world with a prototype train with offensive weapons. When they didn't return, the Ghostbusters were enlisted to rescue them. When the Ghostbusters go inside the ghost world, it is revealed that they were possessed by demons. They were freed from their possession and returned home safely after Egon told the demons that he was one of the Ghostbusters, causing them to flee in terror.