Why was Russia a communist country in the late 1910s and 1930s?
Not links pls.

In Russia, efforts to build communism began after Tsar Nicholas II lost his power during the February Revolution, which started in 1917, and ended with the dissolution of the USSR in 1991. In 1922, the Communist Reds were victorious and formed the Soviet Union, making Russia communist.

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b. the 200th birthday of the united states