[1] In 1942, in the midst of World War II, de Chambrun joined Combat, a group within the French Resistance.

[1][2] She escaped from the Gestapo in Montpellier in July 1943, and she served in Combat in Paris, Marseille and Lyon.

[1] Taking the pseudonym of Lieutenant Noëlle, she joined the Maquis du Mont Mouchet, serving until June 1944.

[1] She also volunteered for Planned Parenthood and served on the board of trustees of the Secours populaire français.

[1] Her funeral was held at the église Notre-Dame de la Carce in Marvejols.