okay I don't own any of this Ed Edd n Eddy belongs Cartoon Network.
The area around Peach Creek and Lemon Brook had fallen to zombies, zombies had taken control of the area with only a few handful of people fighting to survive in these dead towns. The zombie apocalypse started when a meteor crash landed into a cemetery, the meteor contained some radiation while up in space, the radiation from it soaked into the ground and made the dead come back to live.
They rose from their graves and headed for the cul-da-sac. Now these zombies were different from your typical zombies as the radiation had actually made large brains grow inside them making them intelligent, so intelligent that they ambushed their first victims instead of just running in the open mindlessly attacking everyone in sight. They let one person go with a bite turning them into intelligent zombies.
A few months later when people finally learned about the zombies, they tried to fight back by using traps and while that did take out a few of them; the zombies learned of these traps and avoided them as well as making their own. Such as using nets, dropping things on top of human from roofs, and tricking them by disguising their freshly turned ones into quivering living humans and when a group shows up to help they find themselves ambushed by a large group of zombies, it works every time.
The zombies also learned how to use tools and weapons such as guns, they learned that it was more quicker to just shoot people from a distance instead of just chasseing them down. Two years of this kept happening until the Zombies learned that if they kept killing these humans then they will run out of food, so they decided to make farms. The farms or slaughter camps as the handful of humans I mention earlier were kept in them.
They were held in heavy steel door cells. Every week one person was selected to be a meal, while another one was chosen to become a zombie. The zombies kept the population up by force breeding, they put a man and women in a special cell and made them breed.
One day the zombies hopped to spread their population around the globe, but until that day happens they have to settle in these towns for now.