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dizzychicken73
There were two Red Scares.  The first was caused by the Bolshevik Revolution in 1917 Russia, the second was caused by fear of the spread of communism during the Cold War period, particularly during the 1950s. 

A revolution in russia

The United States

1917 and 1918

Prejudice and race riots.  


Cheers!  100% correct.