The Hellsing Organization discovers the existence of Geass and seeks to destroy it at the source - Kamine Island.
However, their intentions are discovered by Lelouch, who intends to prepare. Please read the different scenarios.
Sir Integra (leader)
Alucard (no Level 0. No Schrodinger powers. Will not be the first to strike in the battle)
Walter C. Dornez (pre-Millennium)
Mercenaries led by Pip Bernadotte.
Lelouch vi Britannia (leader)
Jeremiah Gottwald (upgraded)
Suzaku Kururugi (Knight of Seven, not Zero. Has the Lancelot).
Misc. Black Knight foot soldiers.
1. Lelouch discovers Hellsing's plans and prepares for their attack a month in advance.
2. Lelouch does not know the attack is coming.
3. Lelouch counterattacks before Hellsing can strike, attacking their mansion. Hellsing knows it's coming.
4. Hellsing does not see counterattack coming.