German–Soviet Frontier Treaty
The German–Soviet Frontier Treaty was a second supplementary protocol, of the Molotov–Ribbentrop Pact of 23 August. It was a secret clause as amended on September 28, 1939 by Nazi Germany and the Soviet Union after their joint invasion and occupation of sovereign Poland. It was signed by Joachim von Ribbentrop and Vyacheslav Molotov, the foreign ministers of Germany and the Soviet Union respectively, in the presence of Joseph Stalin. Only a small portion of the protocol, which superseded the first treaty, was publicly announced while the spheres of influence of Nazi Germany and the Soviet Union remained classified. The third secret protocol of the Pact was signed on January 10, 1941 by Friedrich Werner von Schulenberg, and Molotov, wherein Germany renounced its claims to portions of Lithuania, only a few months before their anti-Soviet Operation Barbarossa.
Several secret articles were attached to the treaty. These articles allowed for the exchange of Soviet and German nationals between the two occupied zones of Poland, redrew parts of the central European spheres of interest dictated by the Molotov–Ribbentrop Pact, and also stated that neither party to the treaty would allow on its territory any "Polish agitation" directed at the other party.
During the western invasion of Poland, the German Wehrmacht had taken control of the Lublin Voivodeship and eastern Warsaw Voivodeship - territories which according to the Molotov–Ribbentrop Pact were in the Soviet sphere of influence. To compensate the Soviet Union for this "loss", the treaty's secret attachment transferred Lithuania to the Soviet sphere of influence, with the exception of a small territory in the Suwałki Region, sometimes known as the Suwałki Triangle. After this transfer, the Soviet Union issued an ultimatum to Lithuania, occupied it on June 15, 1940 and established the Lithuanian SSR.
- Sharon Korman (1996). The Right of Conquest : The Acquisition of Territory by Force in International Law and Practice. Oxford University Press. p. 167. ISBN 0191583804. Retrieved 25 April 2015.
For the text of the German-Soviet Frontier Treaty see Degras, Soviet Documents on Foreign Policy, iii. 377.
- Davies 2008, page 30 (ibidem).
- Davies, Norman (2008) . Europe: a History. Oxford University Press, Pan Macmillan. pp. 1001, 1004. ISBN 0-19-820171-0.
- Britannica (2015). "A secret supplementary protocol (signed September 28, 1939)". German-Soviet Nonaggression Pact. Encyclopædia Britannica. Retrieved 25 April 2015.
- Eidintas, Alfonsas; Vytautas Žalys; Alfred Erich Senn (September 1999). Ed. Edvardas Tuskenis, ed. Lithuania in European Politics: The Years of the First Republic, 1918–1940 (Paperback ed.). New York: St. Martin's Press. p. 170. ISBN 0-312-22458-3.
- Text of the treaty (English translation) from ElectronicMuseum online, Polish-Canadian website commemorating Katyn massacre
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