Question 172

The United States did not enter the Second World War until Japan attacked the United States.

The United States officially entered the Second World War following the Japanese attack on Pearl Harbor on December 7, 1941. This attack prompted a declaration of war against Japan, leading to the U.S. joining the Allied forces against the Axis powers.

A) news of German concentration camps was reported in the press

While the reports of German concentration camps were alarming and contributed to public opinion against Nazi Germany, they did not directly lead to the United States' entry into the war. The U.S. had not taken military action until the attack on Pearl Harbor.

B) Germany declared war on the United States

Germany declared war on the United States on December 11, 1941, after the U.S. had already declared war on Japan. Although this declaration escalated U.S. involvement in the war, it was the attack on Pearl Harbor that directly prompted U.S. entry into the conflict.

C) Germany invaded France

The invasion of France by Germany occurred in May 1940 and was a significant event in the early years of the war. However, it did not prompt the U.S. to enter the war at that time, as the American public and government were still largely isolationist until the attack on Pearl Harbor.

D) Japan invaded China and formed an alliance with Germany

Japan's invasion of China and its alliance with Germany were part of the broader context of World War II, but these events did not trigger U.S. involvement in the war. The American response remained focused on the attack on Pearl Harbor as the catalyst for entering the conflict.

E) Japan attacked the United States

This is the correct answer, as the attack on Pearl Harbor was the decisive moment that led to the United States declaring war on Japan and subsequently entering World War II. This event marked a significant turning point in American foreign policy and military engagement.

Conclusion

The attack by Japan on the United States was the pivotal event that led to U.S. involvement in World War II, making option E the definitive correct answer. The other options, while significant in the context of the war, did not directly result in the U.S. entering the conflict, highlighting the importance of Pearl Harbor in American history.