why did the soviets and chinese split in 1960
Sino-Soviet split The Sino-Soviet split (1960–89) was the deterioration of political and ideological relations between the neighboring states of the People's Republic of China (PRC) and the Union of Soviet Socialist Republics (USSR) during the Cold War. In the 1960s, China and the Soviet Union were the two largest communist states in the world. The doctrinal divergence derived from Chinese and Soviet national interests, and from the governments' different interpretations of Marxism–Leninism.
Timeline of the North Korean nuclear program This chronology of the North Korean nuclear program has its roots in the 1950s and begins in earnest in 1989 with the end of the Cold War and the collapse of the Soviet Union, the main economic ally of North Korea. The Chronology mainly addresses the conflict between the United States and North Korea, while including the influences of the other members of the six-party talks: China, Russia, South Korea, and Japan.