 During World War II Böhler was "inter alia" working as an advisory surgeon for the Wehrmacht and at the Rudolfspital in Vienna, where he was the head of the surgery department and of a specialized military hospital for bone fractures.Böhler was one of the scientists who continued a successful career as Professor (in 1954 he became a professor) and physician (publishing many medical papers), despite his membership in the Nazi Party.He remained the head of the AUVA-hospital Until 1963.