The French Navy was better able to immediately respond to de Gaulle's call to arms. Most units initially stayed loyal to Vichy, but about 3,600 sailors operating 50 ships around the world joined with the Royal Navy and formed the nucleus of the Free French Naval Forces (FFNF; in French: FNFL). France's surrender found her only aircraft carrier, , en route from the United States loaded with a precious cargo of American fighter and bomber aircraft. Unwilling to return to occupied France, but likewise reluctant to join de Gaulle, "Béarn" instead sought harbour in Martinique, her crew showing little inclination to side with the British in their continued fight against the Nazis. Already obsolete at the start of the war, she would remain in Martinique for the next four years, her aircraft rusting in the tropical climate.