Answer:
The United States initially took a non-interventionist stance towards World War II, with President Franklin D. Roosevelt declaring that the country would remain neutral. However, after the attack on Pearl Harbor in December 1941, the U.S. entered the war and became one of the main Allied powers. From the perspective of the U.S. and the Allied powers, the U.S. entry into the war likely helped to bring about a quicker victory. However, the war had a devastating impact on many countries and resulted in the loss of millions of lives. Additionally, the U.S. decision to drop atomic bombs on Japan has been controversial, with some arguing that it was unnecessary and caused unnecessary suffering.