In 1748, the Treaty of Aix-la-Chapelle, which ended the War of the Austrian Succession, restored Louisbourg to France in return for territory gained in the Austrian Netherlands and the British trading post at Madras in India.
By 1745, he was a chaplain on a ship of war at the various engagements between the sieges of Louisbourg, Nova Scotia.
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In the Treaty of Aix-la-Chapelle (1748), Madras was given back to the British in exchange for the French fortress of Louisbourg in North America, which the British had captured.
He was a colonel in the continental army, serving at Louisbourg and at Fort Beauséjour.
The Louisbourg Garrison (which constituted the bulk of the Île-Royale Garrison) was a French body of troops stationed at the fortress protecting the town of Louisbourg, Île-Royale on Cape Breton Island.
The town's name was given by French military forces who founded the Fortress of Louisbourg in 1713 and its fortified seaport on the southwest part of the harbour, in honour of Louis XIV.
He has been described as the first volunteer in the 1745 invasion of the French Fortress of Louisbourg in Cape Breton Island, now part of Canada.