The first of her line of Battleship, The H.M.S Iron Duke, is famous for the assasination of the last Emperor of Cerulean Empire during her launch ceremonary.

The Iron Duke was the fastest and best armored ship in the Cerulean skyfleet. Her twelve 16'in guns together with her state of the art fire control and rader systems, make her the deadliest ship in the Cerulean Empire.

As the most modern and best equiped ship of her day, she was penciled in as the new flagship for the Empire skyfleet even before her launch, following the tradion of the Cerulean Empire, the ship and her captain along with all her commissioned officers were made knights of the Empire by the emperor during her launch ceremonary.

Thats was when the emperor was shot by a suspected pirate sniper who managed to got away. The death of the Emperor made her the last knight, as the empire collapsed before a new emperor took the throne.