In the 1930s, some communist officials in the Soviet Union decided they needed heroes for their propaganda. Heroes that would show their people the value of hard work. Alexey Stakhanov (1906-1977) was the perfect man for the job.
In the early 1970s, the Soviet Union had quite an unusual project in the Pechensky District, approximately 1000 kilometers / 670 miles North of St. Petersburg. They wanted to find out more about the Earth and decided to start a borehole which was supposed to be 15 kilometers (9.3mi) deep.
In the late 1950s, the two most powerful communist leaders in the World were Nikita Khrushchev (Soviet Union) and Mao Zedong (China). Although officially still allies, they did not particularly care for each other and both thought of themselves as the World leader of communism.
During the Korean War (1950-1953) North Korean invaded South Korea, which was immediately helped by the United Nations (predominately US forces). Once the North was then overrun in a large counterattack, they asked other communist regimes for help.