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. I'll be honest with you, so I'll just make it up. But basically the idea is once the Serbian shot the Austrian, the Austrian declared war on the Serbian. And then the Serbian was friends with Russia, so Russia declared war on the Austrian.