A detachment from Régiment de Walsh-Serrant served as marines aboard John Paul Jones ship Bonhomme Richard. When John Adams arrived to Lorient as American Commissioner in 1779, he was given a dinner by Jones and after the dinner he reviewed the ship's marines from the Walsh Regiment. Drafts from the regiment participated in the Siege of Savannah in 1779. Throughout most of its existence, even in French service, the regiment was issued with red coats with blue facings. Its colors, a Saint George's Cross with a central crown surmounted with a crowned lion, reflected its original status as a Guards regiment of the King of England.