http://www.telegraph.co.uk/news/worldnews/asia/china/7720461/USSR-planned-nuclear-attack-on-China-in-1969.htmlThe Soviet Union was on the brink of launching a nuclear attack against China in 1969 and only backed down after the US told Moscow such a move would start World War Three, according to a Chinese historian.
Liu Chenshan, the author of a series of articles that chronicle the five times China has faced a nuclear threat since 1949, wrote that the most serious threat came in 1969 at the height of a bitter border dispute between Moscow and Beijing that left more than one thousand people dead on both sides.
He said Soviet diplomats warned Washington of Moscow's plans "to wipe out the Chinese threat and get rid of this modern adventurer," with a nuclear strike, asking the US to remain neutral.
But, he says, Washington told Moscow the United States would not stand idly by but launch its own nuclear attack against the Soviet Union if it attacked China, loosing nuclear missiles at 130 Soviet cities. The threat worked, he added, and made Moscow think twice, while forcing the two countries to regulate their border dispute at the negotiating table.
The historian claims that Washington saw the USSR as a greater threat than China and wanted a strong China to counter-balance Soviet power. Then US President Richard Nixon was also apparently fearful of the effect of a nuclear war on 250,000 US troops stationed in the Asia-Pacific region