"Marseillois" took part in the Battle of St. Lucia in September, coming third in the French line of battle, and was present at other encounters with the British fleets in the Anglo-French War. The next year, on 6 July 1779, "Marseillois" took part in the Battle of Grenada, sailing in the rear of the French fleet. Later in the year, she took part in the siege of Savannah, where she was eighth in the line of battle.