This is a term that describes the severe anti-communist suspicion in the united states in the 1940s and 1950s.

The correct answer to the following question will be "McCarthyism ".

Explanation:

McCarthyism , the custom of making allegations of insubordination or disloyalty, in particular of pro-Communist behavior, in several cases unfounded by facts or focused on small, questionable or insignificant facts, a word which often defines the U.S' extreme anti-communist distrust.At a certain time frame, McCarthy of Wisconsin created a series or number of inquiries as well as proceedings to reveal suspected communist penetration in numerous United states government regions.