Let me explain to you a bit about where I live, before your mind gets blown.
First of all, I live in a place called 'the Base'. It's also known as 'hell', for a few of us that really hate this place. I was born here at the Base, apparently, and I grew up here.
Our instructors constantly tell us that the Base is a safe haven. Hundreds of people die in the outside world, from what they say. Here at the Base, we're taught the usual subjects like those in the outside world. We're given special diets to remain healthy, and we're all to be formal to each other.
The great mystery behind the Base is what happens to the 18-year-olds. Once a person turns 18, they leave the Base. Here's the catch: Once you're out of the Base, there's no coming back in, and there's no form of communication between the Base and the outside world. Once you go out of the Base, you're on your own, and no one in the Base, except for possibly the Commanders and Instructors, know what's going on out there.