The attack on Pearl Harbor caused the United States to join the Allied powers.
Here's a step-by-step explanation:
1. Pearl Harbor, a naval base in Hawaii, was attacked by the Imperial Japanese Navy on December 7, 1941.
2. This surprise attack resulted in significant damage to the U.S. Pacific Fleet and led to the United States declaring war on Japan the following day, entering World War II.
3. As a result of this attack, the United States aligned itself with the Allied powers, which included countries such as the United Kingdom, the Soviet Union, China, and others, in opposition to the Axis powers, which included Germany, Italy, and Japan.
In summary, the attack on Pearl Harbor directly caused the United States to join the Allied powers in World War II.
