In December 1943 de Gaulle ordered the internment of Boisson, who had fired on the Free French at Dakar, and of Pierre-Etienne Flandin, who had been Pétain’s premier for three weeks at the end of 1940. The decision to intern these individuals outraged Churchill and Roosevelt. Roosevelt remained grateful to Boisson for having rallied West Africa to the Americans at the end of 1942; Flandin was an old friend of Churchill from before the war (despite having supported the Munich Agreement).
