 In 1757 he was appointed to "Célèbre" and participated in a supply expedition to the fort of Louisbourg in New France.Lapérouse also took part in a second supply expedition in 1758 to Louisbourg, but as this was in the early years of the Seven Years' War, the fort was under siege and the expedition was forced to make a circuitous route around Newfoundland to avoid British patrols.In 1759, Lapérouse was wounded in the Battle of Quiberon Bay, where he was serving aboard "Formidable".