In 1948, shortly after World War Two ended.
No. Poland was actually invaded by the nazis helping to start World War II in 1939. It became a communist country after World War II, but it is no longer a communist country.
Czechoslovakia
soviet union was communist country while America was democracy.Americas and Europeans was afraid that soviets force the rest of the world to communism. That is why they started the cold war that ended in 1991
japan
china
Russia was the only country to become communist during World War 1.
Communism is a classless stateless society based on production for use, and would have to be a worldwide system. The Bolsheviks established a state capitalist system in Russia.
Germany .
north korea
germany
ukrain