The Ultimate Weapon In A Fight Against Chaos Relive the origins of the legendary Master Chief and the Spartan program in this animated adaptation of one of Halo's most beloved stories. Kidnapped as children and conscripted into a brutal military training and augmentation program, the Spartans were designed to be the ultimate weapon against chaos and insurgency — but when a dangerous alien alliance known as the Covenant declares war on humanity, the Spartans might be our only hope.