In November 1942, shortly before German forces began their occupation of the Vichy Republic, he arrived secretly by boat on the Mediterranean coast of France. Based in Castelnau-sur-l'Auvignon, posing as a retired Belgian mining Engineer who had made a fortune in the Congo, he successfully organised a French Resistance network in the southwest corner of France, between Toulouse, Bordeaux and the Pyrenees, designated by the SOE as the 'Wheelwright Sector'. Starr spied on the German 11th Tank Division near Bordeaux. The group he led also cut telephone and power lines and sabotaged power stations. He managed to persuade anticommunist and communist resistance member to join forces to fight the German occupiers. One of his team members was Denise Bloch.