Following the death of Lenin, Josef Stalin took over the Communist Party of the Soviet Union, or the USSR. He led his people through World War II and defeated the Nazis. After the war, Stalin realized that in order to not have another country attack and kill his people, he needed to take over and control East Europe. The US did not agree with Communism, which is why Stalin and President Dwight Eisenhower fought against each other. Stalin fought for the Soviet Party until his death in 1953.