In PSIII, the humans have laws that forbid them from directly killing each other, so they use armies of cyborgs/androids and biomonsters to attack enemy nations.
I suppose that the first several generations of the 'borgs and monsters were created in labs or factories. Some of those 'borgs were probably sealed on the satellite with Siren until Ayn's adventure. By the time of Rhys, it would seem like the technology to create new 'borgs and monsters would have been lost. Given the feudal civilization they live in, I can't believe they would still have such tech and not put it to use in improving their living conditions.
So, where do you think most of the enemies we see in PSIII come from?