Republic of Central Lithuania invaded by the Soviets in summer 1920 and being forcibly incorporated into that state, and only the Polish victory derailed this plan. After the Molotov-Ribbentrop pact and the Soviet invasion of Poland of 1939, Lithuania was given in accordance with the Soviet–Lithuanian Mutual Assistance Treaty Vilnius, and its surroundings up to 30 kilometers, on October 10, 1939. A part of the region was given to the Belarusian SSR. Vilnius very quickly became the capital of Lithuania again. But in 1940, Lithuania was swallowed up by the Soviet Union, forced to become the Lithuanian SSR. Since the restoration of Lithuanian independence
Grand Duchy of Lithuania Grand Duchy of Lithuania The Grand Duchy of Lithuania was a European state that lasted from the 13th century to 1795, when the territory was partitioned among the Russian Empire, the Kingdom of Prussia and Austria. The state was founded by the Lithuanians, one of the polytheistic Baltic tribes from Aukštaitija. The Grand Duchy expanded to include large portions of the former Kievan Rus' and other Slavic lands, including what is now Belarus and parts of Ukraine, Poland and Russia. At its greatest extent, in the 15th century, it was the largest state in Europe. It was a multi-ethnic and