In 1930, he was promoted to "lieutenant de vaisseau", and was made a "chevalier de la Légion d'honneur" in 1935. In December 1936, he joined the Naval War School for one year. When World War II broke out in 1939, he was serving aboard the "Jaguar", as under-chief of the headquarters of the 2nd flotilla of torpedo boats in Mediterranean Sea. In December 1939, he was an aide to Admiral Godfroy in the Headquarters of the "Force X" aboard cruiser "Duquesne"