Duke William was a ship which served as a troop transport at the Siege of Louisbourg and as a deportation ship in the Île Saint-Jean Campaign of the Expulsion of the Acadians during the Seven Years' War. While Duke William was transporting Acadians from Île Saint-Jean (Prince Edward Island) to France, the ship sank in the North Atlantic on December 13, 1758, with the loss of over 360 lives. The sinking was one of the greatest marine disasters in Canadian history.[1]