text: what were some communsit threats that happend in the us during the 1920?   if you are talkng about the comintern of 1919, it refers to a doctrine to export communism around the world, but i am not aware the us had any threats to its national security from the soviets.  we were more in danger of revolution stemimg from the abject misery brought on by the depression.  granted atty general palmer began a round of expelling european immagrants and arresting anarchists, liberals,  social reformists and labor organizers in the palmer raids but... i suppose the biggest threat to the us from communists was ...fear that lead to a number of domestic injustices.  not unlike what is happening today.