the first red scare in the united states was a reaction to which event
First Red Scare The First Red Scare was a period during the early 20th-century history of the United States marked by a widespread fear of Bolshevism and anarchism, due to real and imagined events; real events included the Russian Revolution and anarchist bombings. At its height in 1919–1920, concerns over the effects of radical political agitation in American society and the alleged spread of communism and anarchism in the American labor movement fueled a general sense of concern.