Louisbourg itself was one of the most important commercial and military centres in New France. Louisbourg was captured by New Englanders with British naval assistance in 1745 and by British forces in 1758. The French population of Île Royale was deported to France after each siege. While French settlers returned to their homes in Île Royale after the Treaty of Aix-la-Chapelle was signed in 1748, the fortress was demolished after the second siege. Île Royale remained formally part of New France until it was ceded to Great Britain by the Treaty of Paris in 1763. It was then merged with the adjacent, British colony of Nova Scotia (present day peninsular Nova Scotia and New Brunswick). Acadians who had been expelled from Nova Scotia and Île Royale were permitted to settle in Cape Breton beginning in 1764, and established communities in north-western Cape Breton, near Chéticamp, and southern Cape Breton, on and near Isle Madame.