Question
Which event led to the official entry of the United States into World War II?
the attack on Pearl Harbor
the air strike on Great Britain
the invasion of Poland
the surrender of France
the attack on Pearl Harbor
the air strike on Great Britain
the invasion of Poland
the surrender of France
Answers
GPT-4o mini
The event that led to the official entry of the United States into World War II was **the attack on Pearl Harbor**. This surprise military strike by the Japanese on December 7, 1941, prompted the United States to declare war on Japan the following day, marking its entry into the conflict.