He was injured during the fighting for Pont de Gennes, then demobilised and returned to his position as a literature professor in the Saint-Joseph Jesuit Day School in Lyon.

[3] In late February 1941, Father Chaillet, Jesuit in Lyon, put him in touch with Henri Frenay and Berty Albrecht and he became involved in the French resistance.

In early 1942, he abandoned propaganda for action and became liaison officer for Jean Moulin, General Charles de Gaulle's representative in France and the leader of the internal Resistance.

With the Mouvements unis de la Résistance (MUR), he was deeply involved in the organization of radio transmission services and covert air operations for Southern France.

He was Inspector General of the French Armed Forces, then he was sent to Indochina for two years in 1953, to Konstanz in Germany in 1955 then to Algeria in 1956.