This was one method attempted, I'm not sure it worked as planned, but our presence in East Asia probably prevented some states from falling to communism, but again we'll never know. It is like deterence, our forward presence may have deterred, or maybe the USSR didn't act for other reasons. Like most things in the world there are multiple factors that influence the behavoir/decisions that states make.

http://www.pearsonschoolsandfecolleg...75Chapter2.pdf

One fundamental strategy used by successive US administrations was to attempt to create model states in Asia, to show that democracy and capitalism would bring economic prosperity, freedom and happiness. The USA felt that their political system was the best in the world, and that no country would choose communism when they saw the benefits democracy had brought to these model states. They began with their own ex-colony of the
Philippines. This artificial imposition of western culture onto another country is an example of cultural imperialism.
President Truman used Filipino independence as a means of ensuring US dominance in the PaciŸfic and so strengthening the Pacific Rim Defensive Perimeter Strategy. However, he resisted any suggestion that the USA was in
fact treating it as a colony, in case this provoked a revival of European imperialism. Instead, he emphasised two features of the newly-independent state:
1. Its measures to prevent European dominance of its markets and materials
2. Its democratic values of freedom and liberty. It was intended to be a shining example of capitalist prosperity and democracy to encourage other states in the area to resist the spread of communism.
Break, Bob, our war nor our containment policy was directed at China:

http://www.digitalhistory.uh.edu/dat...y.cfm?HHID=488

In mid-October, the first of 300,000 Chinese soldiers slipped into North Korea. When U.S. forces began what they expected to be their final assault in late November, they ran into the Chinese army. There was a danger that the U.S. Army might be overrun. The Chinese intervention ended any hope of reunifying Korea by force of arms.

General MacArthur called for the U.S. Joint Chiefs of Staff to unleash American air and naval power against China. But the chairman of the Joint Chiefs of Staff, Army General Omar Bradley, said a clash with China would be "the wrong war, in the wrong place, at the wrong time, and with the wrong enemy."
Emphasis is mine.