[2] In 1940, the Bund absorbed a number of tiny Nazi-supporting organisations to become the NBS under Henne and Dr. Max Leo Keller.
[3] Keller had worked with Heinrich Himmler and brought with him Andreas von Sprecher, whom the SS had trained, to run the new group's propaganda department.
[2] Keller, Jakob Schaffner and Ernst Hofmann, as representatives of the NBS, received an audience with the Swiss President Marcel Pilet-Golaz (in office throughout 1940) in which they demanded much closer relations with Nazi Germany, leading to eventual incorporation.
[2] Whilst in Germany Keller set up the Bund der Schweizer Nationalsozialisten as an émigré movement, although its influence remained limited; eventually he returned to Switzerland in 1941.
[2] Meanwhile, various NBS units continued underground activity secretly, mostly with help from the SS, until World War II ended in 1945.