Elizabeth Terrill Bentley was an American NKVD spymaster, who was recruited from within the Communist Party USA (CPUSA). She served the Soviet Union as the primary handler of multiple highly placed moles within both the United States Federal Government and the Office of Strategic Services from 1938 to 1945. She defected by contacting the Federal Bureau of Investigation (FBI) and debriefing about her espionage activities.

The House Committee on Un-American Activities (HCUA), popularly the House Un-American Activities Committee (HUAC), was an investigative committee of the United States House of Representatives, created in 1938 to investigate alleged disloyalty and subversive activities on the part of private citizens, public employees, and those organizations suspected of having communist ties. It became a standing (permanent) committee in 1946, and from 1969 onwards it was known as the House Committee on Internal Security. When the House abolished the committee in 1975, its functions were transferred to the House Judiciary Committee.