He was born in
Verrières-le-Buisson (now in the
Essonne department). Educated in a conservative
Catholic family, he was a remote cousin of writers
Antoine de Saint-Exupéry and
Louise de Vilmorin, later companion of
André Malraux. Estienne d'Orves spent the
First World War as a high school student at the prestigious
Lycée Louis-le-Grand and the
Lycée Saint-Louis-de-Gonzague in
Paris, and entered the
École Polytechnique in 1921. He enrolled in the
École Navale (French Naval Academy), becoming an
enseigne de vaisseau de 2e classe in October 1923 and joining the school ship ''Jeanne d'Arc
. He was then an officer on the battleship Provence, and several other vessels. In 1929, he married Éliane de Lorgeril, with whom he had five children. 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 René-Émile Godfroy in the headquarters of "Force X" aboard the cruiser Duquesne''. On 25 June 1940, the day the
Armistice was signed, he was in
Alexandria,
Egypt. Politically, d'Estienne d'Orves belonged to the
right wing, and sympathized with
Charles Maurras and Catholic
monarchism; nonetheless, while many far-right wing theoricians welcomed the arrival of Marshal
Philippe Pétain, the strongly patriotic d'Estienne d'Orves was unwilling to accept France's defeat. He attempted to join General
Paul Legentilhomme, commander of French troops on the coast of
French Somaliland, who had announced his intention to reject the armistice, but the colony chose to support the
Vichy régime. D'Estienne d'Orves then gathered a group of volunteer sailors and officers, took the
nom de guerre "Châteauvieux" (name of one of his ancestors) and contacted the
Free France authorities. He set sail on a cargo ship from
Aden to
London, sailing around Africa for two months, and joined General
de Gaulle in London on 27 September 1940. He met with Admiral
Émile Muselier, but was unable to obtain a command at sea. Promoted to
capitaine de corvette (lieutenant commander) on 1 October 1940, he joined the Second Office of the
Free French Naval Forces and requested to be sent to occupied France. After having convinced General de Gaulle, on 15 December 1940 he was given the mission to organise an intelligence network in western France, codenamed
Nemrod, which had been created in September 1940 by
Maurice Barlier and
Jan Doornik, but lacked coordination and development. ==Role in Occupied France==