Once upon a time, things went off the rails, and many the world's countries went to war. Millions of innocent people died. Actually, it was more than once, but I am talking about World War II. Let's see how much you know about it. This test is not timed. Warning: This test is a little hard. Hope you listened in history class. I guess we'll find out! ;) We try to keep wars from happening, yet they always do.