World communism ideology could not admit that, to counter the influence of capitalist countries. It also supported revolutionary socialism around the world to continue to work toward world communism, however distant it might be. Thus it backed the 26th of July Movement in the Cuban Revolution, the North Vietnamese in the Vietnam War and the MPLA in the Angolan Civil War. The domino theory of the Cold War was driven by this intent as anti-communists feared that isolationism by capitalist countries would lead to the collapse of their self-defense. The reform and opening of China and the restructuring and openness of the
US signals intelligence in the Cold War a decade of world change, with changes in Cold War alliances and emphasis, the first submarine attack since World War II in the context of a regional war involving extensive power projection, low- and medium-intensity operations, and continuing national policy development. Roughly from the late 1980s on, there was cooperation between the US and the PRC in collecting SIGINT of mutual interest, principally against Russia. It is believed that the Qitai and Korla sites, in Xinjiang (Sinkiang) are operated jointly by the Chinese and the US CIA Office of SIGINT Operations against Soviet missile tests and space launches, but their