In 1763, Vertrieux was given command of the frigate Pléïade for a mission against the Salé Rovers.

On 15 July 1763, Singe mistakenly engaged a galiot from Algiers, mistaking it for a Salé rover.

Pléïade intervened and fired two broadsides into the galiot, which sank with all hands before the error was realised.

This triggered a diplomatic incident and Captain Fabry had to negotiate a resolution to the crisis.

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