Until the present time the foreign policy of the Baltic States between-the-wars period has not been sufficiently researched. Therefore the work at hand attempts to determine among other issues the nature of relations between the Estonian, Latvian and Lithuanian presidents and the Soviet Union. Specifically it also tries to provide answers to the following questions: first, what prevented the Baltic States from cooperating politically and militarily; second, what kind of relations existed between the Baltic States and the great powers - Great Britain, Germany, the USSR and Poland; third, what was implied by the policy of neutrality, declared in the second half of the 1930s. The author of the work at hand attempts to answer the question why in the fall of 1939 the Baltic States were not able to collaborate politically and militarily, and why, unlike Finland, Estonia, Latvia and Lithuania chose the path of unconditional surrender.