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
Centennial of the Restored State of Lithuania of Independence of Lithuania, which proclaimed the restoration of an Independent State of Lithuania, creating a modern state. During World War II, Lithuania was forcibly occupied and annexed by the Soviet Union in 1940, followed by Nazi Germany in 1941, and again by the Soviets in 1944 as one of its constituent republics. During the late 1980s and the dissolution of the Soviet Union, Lithuania fought to restore its independence which culminated in the Act of the Re-Establishment of the State of Lithuania signed on 11 March 1990. In order to have every Lithuanian citizen experience the significance of this