Final answer:
In June 1919, the detonation of eight bombs, including one at the home of U.S. Attorney General A. Mitchell Palmer, intensified the Red Scare and fears of a Bolshevik uprising in the United States.
Step-by-step explanation:
In June of 1919, the United States experienced a series of events that heightened fears about a Bolshevik uprising. This was part of a broader reaction known as the Red Scare, which was a period of intense fear of communism and its potential spread to the United States in the aftermath of the Russian Revolution. The discovery of 36 letter bombs at a New York City post office, targeted at federal, state, and local officials as well as industrial leaders, including John D. Rockefeller, stoked public fear.
The situation escalated dramatically when eight bombs exploded almost simultaneously on June 2, 1919, one of which destroyed the entrance to U.S. Attorney General A. Mitchell Palmer's house in Washington, D.C. This event confirmed the worst fears of many Americans and led to a crackdown on socialists, communists, members of the Industrial Workers of the World (Wobblies), and anarchists, who were all perceived as radical threats to the American way of life.