After 1949, the focus of the Cold War moved to the Far East. There, too, the Communists were getting powerful – China turned Communist in 1949 – and President Truman was worried that, if one country fell to Communism, then other would follow, like a line of dominoes. Stalin, also, was involved in the Far East. In 1949, Kim Il Sung, the ruler of north Korea, had persuaded Stalin and Mao Tse Tung, to allow him to attack South Korea..