It is not so easy to say what, apart from the often discussed technological and organizational advances, from artillery to drill, separates the carnage of La Rochelle from the carnage of Marengo.
Joseph O'Brien, Ballydoyle's stable jockey and son of the trainer, had opted to ride the equally immodestly named Battle of Marengo, leaving the way clear for Ryan Moore to claim the ride on Ruler of the World.