The documents included in the collection cover the period from the end of September 1938 to the beginning of September 1939. The collection contains extensive correspondence between the People's Commissariat for Foreign Affairs of the USSR and Soviet plenipotentiaries in England, France, Germany and other countries, recordings of conversations, texts of proposals to foreign countries, speeches by Soviet officials, reports by Soviet military attaches and Soviet military intelligence about the aggressive plans of Germany, Japan and Spain, TASS reports, some materials from the Soviet press.