The event which had the greatest impact on the country during the Anti-Communist fear that gripped the United States was the sensational trials of some Americans (for example, Julius and Ethel Rosenberg) accused of espionage.
<h3>What was the anti-communist fear called?</h3>
The anti-communist fear was known as the Red Scare, later championed by Senator Joseph McCarthy.
Later the Red Scare was termed McCarthyism, following the unreasonable accusations against some individuals and groups, including communist or socialist sympathizers.
Thus, the sensational trials of some Americans had the greatest impact on the country during the Anti-Communist fears.
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