In the book of Professor I.N. Zemsky recreates the picture of the acute diplomatic struggle associated with the opening of the second front in Europe during the Great Patriotic War. The active foreign policy activities of the CPSU and the Soviet state are revealed, aimed at strengthening the anti-Hitler coalition, which has demonstrated wide opportunities for cooperation between states regardless of their social system. The book is intended for international scholars, teachers, as well as a wide range of readers interested in the history of Soviet foreign policy and the problems of World War II.