Rachel Dübendorfer

Rachel Dübendorfer ( Hepner; She was the daughter of Adolf Hepner, She moved to Germany in the 1920s and moved to Nürensdorf, Switzerland in 1933. In 1927, she joined the Soviet Main Intelligence Directorate (GRU), She received intelligence reports from German refugee Rudolf Roessler (nicknamed Lucy) Others in the movement included Georges Blun and Otto Pünter. In 1942, Dübendorfer received German military information about the planned Case Blue invasion of the Soviet Union (USSR), which was eventually transmitted to the Soviet Union. Dübendorfer tried unsuccessfully to contact Moscow through Hermina Rabinovitch, a friend who lived in Montreal, Canada.

Afterward, Dübendorfer refused to co-operate with Soviet leader Joseph Stalin and did not want to send information back to Moscow. She provided information to MI6 officers in Switzerland, under the proviso that this information was not shared with Moscow. In April 1944, Dübendorfer and Böttcher were captured. She was imprisoned in the USSR and later East Germany from 1946 until 1956 and so she never became a leader.