Humans, the greedy creatures who doesn't know the meaning of satisfaction. Every generation is science and technology improvement.
They will work hard as to reach the world's peak. With knowledge they believe they can create anything and have control on it and even have the power to rule other nations.
At that time, technology already advanced to the greater heights as everything was done by high technology and advanced machines. Machine is the core of the world in that era.
Two nations named Epsilon and Sualocin were competing to gain the power of technology and rule other countries. They created weapons and advanced technological machines. Even after their hard work, they couldn't control them easily cause it needs high knowledge on controlling them. So, they decided to create something that can control the easily on their command.
But, they made a big mistake for creating such a big and a life scaring thing in their life. The thing that was created was called The Eradicator, means destroy. The Eradicator is an Artificial intelligence that was expected to control everything in the nation after them. This includes weapons and even their nation.
Instead for the AI to help the government keep everything under control, it betrayed the government and started to rule the government and the nation itself. The nation Epsilon was therefore ruled by an AI.