When did the U.S. join World War II?
1 Answer
May 1, 2018
After the attack in Pearl Harbor on Dec, 7th 1941
Explanation:
The USA joined WWII after the Japanese attack on Pearl Harbor on Dec 7th 1941, it was a military base in Hawaii.
The USA did not declare war only on Japan but on its allies that is to say Germany and Italy( the Axis).