Code Geass

On August 10 of the Common Era, the Holy Empire of Britannia invaded Japan. In order to take the mainland, the Britannian uses giant robots called Knightmare Frames.

The Japanese defences fell one after another before the might of Project Knightmare. Japan became a territory of the Empire and was stripped of its freedom, rights, and even its name. Japan is now referred to as Area 11 and its people, the Elevens.

Lelouch Lamperouge is a young prince of Britannia living in Japan. He is stripped of his title and is in hiding. He has gained the power of Geass - the power of absolute obedience which makes anyone obey any order. With this new found power Lelouch is determined to destroy the Holy Empire of Britannia, to avenge the death of his mother and to create a world where his sister Nunally, can live peacefully.

He becomes 'Zero', a hero to the Japanese, a terrorist to the empire.