The major cause is the Germany was using submarines to sink down the American ships and killed all of the American soldiers, and that is why the U.S join the war and pay back... mark me brainlist please...
Answer:
The Soviet-Nazi pact was a nonaggression treaty. It stated that in the case of war, the two countries would not attack one another.
Explanation: Nonaggression treaties are common between countries.
Wearing a kimono or something like that
