http://code-geass.bandai-ent.com/
A little about it.
On August 10th of the Common Era, the Holy Empire of Britannia invaded Japan. In
order to take the mainland, the Britannian forces mobilized the first of the
Knightmare Frames; a new humanoid powered armour. 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. Area 11 was
the new designated name given to the defeated Japan.
Lelouch Lamperouge is a castaway prince of Britannia who has gain the power known as
Geass, the power of absolute obedience. 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.