linguistic:translation
World War II

In September 1939, when France declared war on Germany in response to the invasion of Poland, Baker was recruited by the Deuxième Bureau, the French military intelligence agency, as an "honorable correspondent". Baker worked with Jacques Abtey, the head of French counterintelligence in Paris.She socialized with the Germans at embassies, ministries, night clubs, charming them while secretly gathering information. Her café-society fame enabled her to rub shoulders with those in the know, from high-ranking Japanese officials to Italian and Vichy bureaucrats, reporting to Abtey what she heard. She attended parties and gathered information at the Italian embassy without raising suspicion.

When the Germans invaded France, Baker left Paris and went to the Château des Milandes, her home in the Dordogne département in the south of France. She housed people who were eager to help the Free French effort led by Charles de Gaulle and supplied them with visas. As an entertainer, Baker had an excuse for moving around Europe, visiting neutral nations such as Portugal, as well as some in South America. She carried information for transmission to England, about airfields, harbors, and German troop concentrations in the West of France. Notes were written in invisible ink on Baker's sheet music. As described in Jazz Cleopatra, "She specialized in gatherings at embassies and ministries, charming people as she had always done, but at the same time trying to remember interesting items to transmit".

Later in 1941, she and her entourage went to the French colonies in North Africa. The stated reason was Baker's health (since she was recovering from another case of pneumonia), but the real reason was to continue helping the Resistance. From a base in Morocco, she made tours of Spain. She pinned notes with the information she gathered inside her underwear (counting on her celebrity to avoid a strip search). She met the Pasha of Marrakech, whose support helped her through a miscarriage (the last of several). After the miscarriage, she developed an infection so severe it required a hysterectomy. The infection spread and she developed peritonitis and then sepsis. After her recovery (which she continued to fall in and out of), she started touring to entertain British, French, and American soldiers in North Africa. The Free French had no organized entertainment network for their troops, so Baker and her entourage managed for the most part on their own. They allowed no civilians and charged no admission.

After the war, Baker was awarded the Resistance Medal by the French Committee of National Liberation, the Croix de Guerre by the French military, and was named a Chevalier of the Légion d'honneur by General Charles de Gaulle.

Baker's last marriage, to French composer and conductor Jo Bouillon, ended around the time she adopted her 11th child.