Code Geass

The Holy Empire of Britannia invaded Japan on August 10th of the common Era.  Japanese defences fell one after another, before the might of Project Knightmare.  After the war Japan was given the name Area 11.  At the time of the invasion young Lelouch vowed to his Japanese friend Suzaku that he'd be the one to destroy Britannia.  Years later, when Lelouch is in high school, but he regularly skips out of school to go play chess and gamble on himself.  So one day Lelouch accidentally gets caught up in a local terrorist attack against Britannia, and gets reunited with his childhood friend Suzaku as well as meeting some mysterious girl who goes by C.C. When the rest of Suzaku's team arrives Lelouch is cornered in a life and death situation.  The girl gives Lelouch the power known as Geass (which makes anyone obey any order).  Now with this power Lelouch wages war against the Empire under the alias Zero, and he does this for the attempt to fulfill his childhood vow.  He is also determined to destroy the Empire to avenge the death of his mother and to create a world where his sister Nunnally can live peacefully.  And Yes, to all the manga fans out there, there is indeed a manga for this series that you could read.