On August 4, 1914, Germany declared war on and subsequently invaded Belgium, a declared neutral in the escalating conflict between France, Russia, and the allied countries of German and Austria-Hungary. Europe at the time had been spoiling for a war, and the Byzantine tangle of pacts, treaties, and agreements ensured that it was only a question of when, not if, the entire continent would find an excuse to kit up and march off to battle. That excuse came in June of 1914, when Archduke Franz Ferdinand was assassinated by Serbian radicals. And so the dominoes fell. Austria-Hungary declared war on Serbia. Serbia was allied with Russia, who had no choice but to declare war on Austria-Hungary. Germany was allied with the Austro-Hungarian Empire and so declared war on Russia. France, which had treaties with Russia, thought about staying neutral in the matter, but that became a moot point when Germany declared war on them, launching an offensive that bulldozed its way through Belgium en route to France and brought the United Kingdom into the war as a result of a pact Britain had with Belgium.