The Cold War at Home document discusses the fear of Communist influence that pervaded American society during the Cold War era. It summarizes that the Loyalty Review Board investigated over 3 million federal employees from 1947-1951 for loyalty to the U.S., dismissing 212. The House Un-American Activities Committee (HUAC) subpoenaed many in Hollywood for suspected Communist propaganda. This led to a Hollywood blacklist of around 500 people. Senator Joseph McCarthy falsely accused many Americans of Communist ties without evidence, fueling widespread fears in a period known as McCarthyism.