In 1941 he joined the Libération-Nord movement of the French Resistance and was a member of the "Comité d'action socialiste", the clandestine form of the then-banned SFIO. Following the defeat of German forces in France following the Allied landings in Normandy and Provence, Bordeaux was liberated by the French Forces of the Interior and Audeguil was appointed by the Provisional Government of the French Republic to act as mayor of the city. He was also appointed to represent Bordeaux in the National Assembly, the replacement for the old Chamber of Deputies. He was confirmed in both posts by elections in 1944 and 1945 respectively. His election as mayor was the first where women have the right of vote in Bordeaux.