War II came to an end in 1945, the Soviet Union incorporated the region into the Lithuanian SSR. Since 1990 the area of the Klaipėda Region has formed part of the independent Republic of Lithuania, as part of Klaipėda and Tauragė counties. The southern border established by the Treaty of Versailles defines the current international boundary between Lithuania and the Kaliningrad Oblast of the Russian Federation. Timeline Treaty of Versailles The eastern boundaries of Prussia (from 1871, part of the German Empire), having remained unchanged since the Treaty of Melno in 1422, became a matter of discussion following World War I, as the newly independent states of Poland and Lithuania emerged. The separatist Act of Tilsit was signed by few pro-Lithuanian oriented Prussian Lithuanians in 1918, demanding the unification of Prussian Lithuania with Lithuania proper. It is traditionally viewed by Lithuanians as expressing the desire of Lithuania Minor to unite with Lithuania – but the majority of Prussian Lithuanians did not want to join with Lithuania and the Prussian Lithuanians did not make up a majority of the population. The division of Prussia was also promoted by Poland's Roman Dmowski in Versailles who acted by orders of Józef Piłsudski: the purpose was to give the lower part of Neman River and its delta, which was located in Germany and called the Memel River, to Lithuania as this would provide her access to the Baltic Sea, while Lithuania itself should be part of Poland. These ideas were supported by the French prime minister Georges Clemenceau. In 1920, according to the Treaty of Versailles, the German area north of the Memel river was given the status of Territoire de Memel under the administration of the Council of Ambassadors, and French troops were sent for protection. During the period of French administration, the idea of an independent State of Memelland grew in popularity among local inhabitants. The organisation Deutsch-Litauischer Heimatbund (German-Lithuanian homeland federation) promoted the idea of a Freistaat Memelland, which later should return to Germany. It had 30,000 members, both ethnic Germans and Lithuanians, about 21% of the total population. Lithuanian takeover On 9 January 1923, three years after the Versailles Treaty had become effective, Lithuania occupied the territory during the Klaipėda Revolt, mainly by militia that had entered the region from Lithuania. France at the same time had started the Occupation of the Ruhr in Germany, and the French administration in