What event took place in china in 1949 which to solidify the policy of containment in the us?

The correct answer is the Chinese Revolution.

This revolution took place during 1949 and was a culmination of the efforts made by the Communist party in China to take control of the government. This resulted in the creation of a communist government under the leadership of Mao Zedong on October 1, 1949.

Is there a passage that comes with this question or should i know this right off the bat, because if it is, i probably have short term memory loss or college is too stressful