What was the significant international consequence of the Pearl Harbor attack?

• A. It did not affect United States involvement in the war
• B. It caused the United States to withdraw from the Pacific
• C. It prompted the United States to enter World War II
• D. It resulted in a peace agreement with Germany

Answer: (C)

The main idea being tested is how a single event changed a country’s role in global affairs. Pearl Harbor was a turning point because it shifted the United States from a stance of neutrality to active involvement in World War II.

The attack on December 7, 1941, stunned and outraged the American public and led Congress to declare war on Japan the next day. With Japan as part of the Axis and Germany and Italy allied to Japan, those powers then declared war on the United States, pulling the country into both the Pacific and European theaters. This mass mobilization—factories converting to war production, huge military buildup, and overall national commitment to the war effort—altered the course of the conflict and redefined the country’s international role for years to come.

The other possibilities don’t fit with what happened. The event did not leave the United States uninvolved; it brought the country into the war. It did not cause a withdrawal from the Pacific; it intensified U.S. presence there. It did not lead to a peace with Germany; it led to war with Germany and its allies as well.