Nyora kupfuurira kweiyi ndima - Pakutanga kweHondo yeAnglo-French muna 1778, Grenier akanga achishumira pa"Sphinx" yemapfuti 64. Akatora chikamu muHondo yeUshant, uye akabva apiwa kutungamira kwefrigate "Boudeuse" muchikwata pasi peEstaing. Pana 22 January 1779, akabata ngarava yokuBritain inonzi "Weazle". Akatora rutivi muHondo yeGrenada uye muKukombwa kweSavannah
muna September 1779. Muna 1780, akanga ari pabasa rokuperekedza ngoro. Grenier akasimudzirwa kuva Kaputeni musi wa 9 May 1781, uye akashanda pa "Bretagne". Ipapo akashanda pazvinhu zvechikwata chaGuichen.