There’s a long road ahead…
The world has been thrown back into the dark ages. Cities have fallen, the once rich soils are irradiated and people will do what ever is necessary to survive. Murder isn’t out of the question: joining a raiding party may be unethical, but it beats starving to death. It’s not uncommon to see entire campgrounds razed for a bite to eat.
There are others, though, who seek to rebuild civilization. These are not timid folk, scared to raise a weapon, hoping it will all blow over. On the contrary. If you are not with them, you will be removed from the planet for your wasteful existence. They can promise you shelter, food, water and protection in return for your service.