Code Geass - Lelouch of the Rebellion

Japan has been invaded and conquered by the Britannian Empire. Japan is now known as 'Area 11' and its citizens known as 'Elevens'. The Britannian Empire takes away Japan's autonomous power and imposes its rule through the use of 'Nightmares/Knightmares'. The Empire's rule has never faltered, but cracks have begun to show...
Quoted from ANN

The Britannian youth, Lelouch, received a special power from a mysterious girl. GEASS. An absolute power which allows the user to give orders to anyone. Lelouch decided to plan the destruction of the Britannian Empire by using this as a weapon. His goals are to take revenge for his mother, and to create a world in which his little sister, Nunnally, could live in peace. All while knowing that what lies ahead is his father, the Emperor of Britannia.

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Episodes 24 & 25