I was wondering if anybody could help me with this:

Which of the following most directly involved the United States in World War 1?

1. The invasion of Russia
2. The German sinking of an ocean liner
3. The assassination of Archduke Franz Ferdinand
4. The alliance between Britain and France

I assumed it was #2, I wanted to see if I was correct and I also wanted to get a little bit more information on it. Thank you!

3 answers

Yes, 2 is correct, in part -- the others are wrong.

http://www.bing.com/search?q=the+u.s.+entry+into+world+war+i&form=EDGNTC&qs=PF&cvid=bd387db364c14ea5b9cc22006904f068&pq=the%20u.s.%20entry%20into%20world%20war%20i

http://www.history.com/topics/world-war-i/lusitania
Thank you!!!!!!
You're welcome. This is a fascinating part of our history, with lessons to be learned for our own times and the future!