The HUAC was founded in 1938 to find Nazi sympathizers in government. After WWII, HUAC switched to the communist threat
SPSI means
The Senate Permanent Subcommittee on Investigations
The SPSI held hearings on communist influence in US society
The FBI investigated security risks in the U.S. and participated in creating a climate of fear with the creation of propagandistic films
In 1947, under pressure, Truman signed a "loyalty order" establishing loyalty reviews for federal employees
Two espionage cases caused an anticommunist frenzy :
1948 Alger Hiss
1951-1953 Julius and Ethel Rosenberg
In 1948, Alger Hiss, a member of the State Department, was accused of being part of the secret "communist underground" in Washington D.C. without substancial evidence
In 1951-1953 : Julius and Ethel Rosenberg (two members of the American Communist Party in the 1930s) were indicted and executed for passing secret bomb-related documents to the Soviets