Zero Requiem

Zero Requiem is a plan created by Lelouch and carried out with the assistance of Suzaku and possibly C.C. to end all war and to usher an age of peace. The plan involved focusing all of the world's hatred on himself, then have Suzaku pose as Zero and kill him, dissipating the hatred and allowing the world to focus on more important matters than fighting, such as reconstuction, thus facilitating peace.

Aside from Lelouch, Suzaku and C.C., several other key characters knew about Zero Requiem, including Jeremiah Gottwald, Lloyd Asplund, Cécile Croomy, Sayoko Shinozaki and Nina Einstein, while others such as Nunnally, Kallen, the core Black Knights members and Cornelia only realized it during and after his execution.