Code Geass: Lelouch of the Rebellion

Japan has been invaded and conquered by the Britannic Empire. Japan is now known as "Area 11" and it's citizens known as "elevens". The Britannic Empire takes away Japan's autonomous power and imposes its rule. The Britannic Empire enforces its rule through the use of "Nightmares". The Empire's rule has never faltered, but cracks have begun to show...