Code Geass: Akito the Exiled - The Wyvern Arrives

The story takes place in 2017, when the Holy Britannian Empire is invading Europe. The empire's forces are overwhelming, resulting in heavy casualties. To counter this, the army establishes a special unit called Wyvern (W-0), composed of former Japanese citizens known as "Elevens" who were recruited from ghettos. These Elevens pilot Knightmare frames into combat, where they often face death.

Among the Wyvern pilots is Lieutenant Akito Hyuuga, nicknamed "Hannibal's Ghost" for his battlefield skills. When a European regiment is pinned down, W-0 is sent to rescue them. However, things go awry when the commanding officer initiates a self-destruct sequence, leaving Akito as the sole survivor.