GED Social Studies TestU.S. HistoryMedium
Which of these events most directly led to the United States' entry into World War II?
- AThe Japanese attack on Pearl Harbor in 1941.
- BThe German invasion of Poland in 1939.
- CThe Battle of Britain in 1940.
- DThe signing of the Lend-Lease Act in 1941.
Show answer & explanationAnswer & explanation
Correct answer: A. The Japanese attack on Pearl Harbor in 1941.
While the U.S. had been providing aid to the Allies and was increasingly hostile towards the Axis powers, the direct and unprovoked attack by Japan on the U.S. naval base at Pearl Harbor on December 7, 1941, was the catalyst that led to a formal declaration of war.
Why the other options are wrong
- B. The German invasion of Poland started WWII in Europe, but the U.S. remained neutral at this point.
- C. The Battle of Britain was a major air campaign in Europe, but the U.S. was not directly involved in combat operations at this time.
- D. The Lend-Lease Act was a significant step towards U.S. involvement, providing aid to the Allies, but it did not constitute direct entry into the war.
Pearl Harbor Attack
A surprise military strike by the Imperial Japanese Navy Air Service on the United States naval base at Pearl Harbor, Hawaii, on the morning of December 7, 1941.
- Resulted in over 2,400 American casualties.
- Crippled much of the U.S. Pacific Fleet.
- Prompted the U.S. declaration of war on Japan the following day.
Memory trick: Pearl Harbor's fire, ignited war's desire.