The spark would be the assassination of Archduke Ferdinand. And I won't go too much into the story, you might not want to know it, but basically Archduke Ferdinand was assassinated, I believe, by a Serbian. He was an Austrian prince, and I believe he was in Bosnia. And he was assassinated because of nationalism, because the Serbs didn't want to be part of it. It's complicated. But that one bullet that killed that one prince is what knocked those house of cards over. I don't know the exact order.