The book examines the phenomenon of Soviet collaboration using the example of representatives of Turkic-Muslim peoples. It was the result of work in archives and libraries in Germany. Of particular interest are the documentary materials of various institutions of National Socialist Germany, both military and civilian: materials of the Ministry of Foreign Affairs, the Ministry for the Occupied Eastern Territories (Eastern Ministry), the Main Directorate of the SS, the command of the Eastern Legions and various military formations of the Wehrmacht. The available material allows us to reproduce with sufficient accuracy one of the large-scale military-political scams of the Third Reich - an attempt to organize military and political cooperation with representatives of the Turkic-Muslim peoples of the USSR. Its results are very interesting.