and the Messerschmitt plants near Vienna. These contributions by the resistance group via the defense industry and production sites (crucial for the Operation Crossbow and Operation Hydra, both preliminary missions for Operation Overlord) were later to prove to be 92 percent correct and were thus an effective contribution to Allied warfare. On the one hand, the Allies were able to target the arms industry and on the other hand, this information and the subsequent air strikes decisively weakened the supply of the German Air Force, which together also had the effect of shortening the war. In this regard, it is often stated that if the war against Nazi Germany had lasted longer, the first atomic bomb would have been used over Berlin or the industrial centers of Ludwigshafen am Rhein and Mannheim. Messner provided the first information about the mass murder of Jews from his Semperit plant near Auschwitz - a message the enormity of which amazed the Americans in Zurich. However, the Maier-Messner-Caldonazzi resistance group's plan to bring an American transmitter of the Office of Strategic Services (OSS) from Liechtenstein to Austria failed. The British Special Operations Executive (SOE) was in contact with the Austrian resistance group through its colleague G. E. R. Gedye in 1943, but was not convinced of the reliability of the contact person (Franz Josef Riediger, a Messner employee) and did not cooperate due to security concerns. In addition to establishing contact with Allied secret services, the resistance group also tried to educate its own countrymen in order to prepare them politically for a future peace order. To this end, a central committee or preparatory groups in the event of a collapse of the German Reich and a future independent state of Germany with a monarchical form of government were planned, which, in addition to Austria, should also include Bavaria and South Tyrol. Helene Sokal and her later husband, the chemist Theodor Legradi, who had international connections to the communist resistance, among others, included the doctor Josef Wyhnal and the student Hermann Klepell. Klepell had relationships with socialist circles, while another member, the communist Pawlin, made connections with the KPÖ. Since Maier grew up in poor circumstances, he was very open to social issues. In the summer of 1942, the resistance group was able to send a “memorandum” drawn up by Maier, Sokal and Legradi to the Allies (addressed to the British and Soviet Foreign