As head of the French fleet in the 1860s, he oversaw maritime routes in the Indian Ocean and investigated Henri Lambert's death.

[3] Fleuriot de Langle’s naval career spanned decades and was marked by a variety of notable accomplishments.

In 1845, his diplomatic acumen earned him a role alongside M. de Broglie in England, where they successfully negotiated the removal of Britain’s right to inspect French ships.

His responsibilities were vast, encompassing the surveillance of Indian Ocean maritime routes, protecting French political and economic interests, ensuring the safety of merchant ships, and overseeing the recruitment of workers.

He was particularly involved in Zanzibar during the investigation into the death of Lambert, an episode that highlighted the complexity of his duties and the extended nature of his missions.