So, after the apocalypse, there is a community of 260 androids in an old factory out of in Fresno. They have been trading with the human settlements for things like scrap metal and more importantly Fusion™ Batteries (don’t fix this, Fusion is the name of the company). They were in a harsh energy crisis since the tribals from Sierra started a war with settlements that traded the most with them. The androids 500-year-old community was nearly destroyed, and the robots have had enough with humans and their petty wars. They decided to enslave the humans so they can get a constant supply of batteries, but, not wanting to deal with the slaves revolting and escaping, they need to do it in secret. So, how do you enslave a group of people without them knowing?
There are about 4,500 humans around the factory, 2,000 of those are farmers and herdsmen, 2,000 are tribals, and 500 are traders and merchants. The people of Fresno ruins live a mostly agrarian lifestyle as subsistence farmers or craftsmen like blacksmiths. There are also a few clerics. The tribals have been at war with the major settlements for land rights and such.
The Androids are metal men that don’t look like humans, but they aren’t in the uncanny valley. They were designed to look appealing, and most humans have the ability to trust them. They have weapons like automatic rifles and submachine guns, but they prefer to carry out covert operations most of the time m. The leader of the community, a supercomputer, has many data files and blueprints about past technologies, and the androids are mostly smarter than humans, and better at multitasking.