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
Politics of Lithuania Politics of Lithuania Politics of Lithuania takes place in a framework of a unitary semi-presidential representative democratic republic, whereby the President of Lithuania is the head of state and the Prime Minister of Lithuania is the head of government, and of a multi-party system. Executive power is exercised by the President and the Government, which is headed by the Prime Minister. Legislative power is vested in both the Government and the unicameral Seimas (Lithuanian Parliament). Judicial power is vested in judges appointed by the President of Lithuania and is independent of executive and legislature power. The judiciary consists of the