<P> 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 . </P>
<P> 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 . </P>
the first red scare in the united states was a reaction to which event
the first red scare in the united states was a reaction to which event
due to real and imagined events ; real events included the Russian Revolution and anarchist bombings
due to real and imagined events ; real events included the Russian Revolution and anarchist bombings