Drucour joined the French Navy in 1719 as a midshipman in Toulon.

In October 1746, while aboard the Mars, a French naval vessel which was returning to France as part of the failed Duc d'Anville Expedition, he was taken prisoner by the British, and imprisoned for a year before returning to France.

In 1754, he was appointed Governor of Île Royale.

During his career he made 16 major voyages to such places as Copenhagen, Stockholm, Martinique and Saint-Domingue.

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