Enlisting in the Melkian army as an Armored Trooper pilot, Chirico distinguished himself in many battles against Jimmy Brando and was transferred at age 16 to the elite Red Shoulder Battalion. There, he was scrutinized by the commanding officer, Colonel Yoran Pailsen. Pailsen had been watching Chirico for many years, and had become convinced that Chirico's miraculous recuperative powers made him unkillable; a supreme survivor. After nearly ending Pailsen's life, Chirico was thrown into the final battle of Sunsa. He wasn't supposed to survive it, but he did. This was the battle that brought the Hundred Years War to an end, and the Red Shoulder Battalion was disbanded soon after.