Who Started World War I: Crash Course World History 210

In which John Green teaches you WHY World War I started. Or tries to anyway. With this kind of thing, it's kind of hard to assign blame to any one of the nations involved. Did the fault lie with Austria-Hungary? Germany? Russia? Julius Caesar? One thing we can say for sure is that you can't blame the United States of America for this one. Woohoo! Well, you can hardly blame the US.

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