Code geass

 

Never has there been an anime that blended, brilliant character development, amazing music, intriguing moral dilemmas, immersive story, and exciting mecha battles as well as Code Geass has. 

summary: Following a war in which the Japanese were involved, Japan was lost to the British Empire. A young student leads a rebellion against the Holy Empire in order to avenge his mother's death. He wishes to create a new world for himself and his sister by utilising a newly discovered power known as Geass.

description:

The British Empire has invaded Japan with Knightmare Frames, giant robot weapons.Japan is now referred to as Area 11, and its inhabitants as 11's. At the time, Lelouch, a Britannian living in Japan, vowed to his Japanese friend Suzaku that he would destroy Britannia. Lelouch is in high school now, but he frequently skips class to play chess and gamble on himself. One day, he encounters terrorists 11 who have stolen a military secret and is apprehended by Suzaku, a member of the Britannian task force dispatched to track them down.