Yes
it was attacked by Germany in 1914
The United States planned to stay neutral after the war broke out. However, after the Germans attacked, they decided to join to get even.
England joined because Germany attacked Belgium
Yes
Japan attacked us at Pearl Harbor, Hawaii
Roosevelt wanted to remain neutral. However, when Japan attacked Pearl Harbor, all that changed.
April 6th, 1917
April 6
You have to wait a couple of years and then join in only when you're attacked by the Japanese
No. Canada joined the war at the same time as England.
cause they wanted too