[6] In 1778, Proisy captained the 74-gun Glorieux, part of the White-and-blue squadron under Du Chaffault in the fleet under Orvilliers.

Beausset chased the retreating British escort, comprising the 74-gun HMS Ramillies and the frigates Thetis and Southampton.

Lamotte-Piquet, who commanded the vanguard of the fleet, moved to engage, precipitating the Battle of Cape Spartel.

La Crenne requested permission to engage, but Beausset refused and insulted Lamotte-Piquet in front of the crew.

[18] In 1789, Beausset was a member of the Navy Council, with the rank of Lieutenant général des Armées navales.