Mobile Suit Gundam Wing - Operation 9
The Gundam pilots face their toughest challenge ever as the battle OZ forces equipped with a battle program based on the Epyon's operation system!  Heero leaves Quartre to take command while he goes off on a separate mission -- to sneak onto the Libra.  He Relena face Milliardo, but Milliardo has other callers as well.  His old friend Treize has arrived and challenges him to a duel to decide the outcome of the war!