The collection was prepared by the Ministry of Foreign Affairs of the USSR. The documents cover the period from August 1939 to August 1940 inclusive. The collection includes the correspondence of the People's Commissariat of the USSR with Soviet diplomatic missions in the Baltic countries, telegrams, letters, political reports, notes of conversations, as well as the texts of treaties and agreements with Latvia, Lithuania and Estonia of this period. Collection "Plenipotentiaries report. prepared on the basis of materials from the Archive of Foreign Policy of the USSR *.