Answer:
The Russian Revolution was a revolutionary movement carried out by the political left of that country in 1917, through which the absolutist monarchy was overthrown and a communist-style government led by the Bolsheviks was established, after a civil war that lasted since said year until 1922.
After this revolution, communism, understood as the political system that called for collective ownership of goods and services and total dominance by the government of economic processes, was established in Russia and the neighboring countries, later creating the Soviet Union. that happened to rival America in terms of international geopolitical dominance.
Thus, this revolution put in check not only the international position of the nation, but the capitalist ideology itself defended by the rulers and the majority of the Americans, given the insertion into the society of the United States of communist minority groups, which gave origin to the Red Scare, a social reaction contrary to communism.