The British fleet was further reinforced in January 1779 by ten ships of the line under Admiral John Byron, who assumed command of the British Leeward Islands station. Throughout the first half of 1779, both fleets received further reinforcements, after which the French fleet was slightly superior to that of the British. Furthermore, Byron departed St. Lucia on 6 June in order to provide escort services to British merchant ships gathering at St. Kitts for a convoy to Europe, leaving d'Estaing free to act. D'Estaing and Governor Bouillé seized the opportunity to begin a series of operations against nearby British possessions.