What was the name given to the widespread fear of suspected Communists and radicals in the United states after world war 1?

The widespread fear of suspected Communists and radicals in the United States after World War I is known as the "Red Scare." This period, particularly prominent from 1919 to 1920, was characterized by a heightened paranoia about communism and anarchism, fueled by events such as the Russian Revolution and a series of bombings. Government actions, including the Palmer Raids, sought to identify and deport perceived radicals, reflecting the intense anxiety of the era.