One Piece Fan fiction Mark

Mark is twin to the well known emperor Shanks .At birth they were seperated but as Shanks rank increases Mark seeks him, already aware of their relation. But he was a marine, natural enemy of his brother a pirate, to save his sibling he takes a big risk and creates the revolutionary army. He leaves his closest friend Dragon D Luffy incharge of the organization and his son Monkey D Luffy in the care of his brother Shanks . This is the journey of Luffy's godfather, the brother of one of the four emperors ,the one who scarred the strongest elder.This is the journey of Marks