Assault on the Geass Order

The Black Knights swarm the Geass Directorate's city, massacring all Geass users in the city, including children. Due to the lack of many Knightmare Frames, the people in the Geass Directorate are quickly killed with little resistance. The only actual battle is between V.V. in the Siegfried and the Black Knights. The Siegfried is eventually brought down, leaving V.V. seriously injured and barely able to make it to Charles zi Britannia to exchange his code.