The Telegram That Started a World War
On July 28, 1914, Austria-Hungary declared war on Serbia — and a "small, local" war exploded into a global catastrophe.
At 11 o'clock in the morning on July 28, 1914, a telegram crossed Europe, and the old world began to end.
One month earlier, the heir to the Austro-Hungarian throne, Archduke Franz Ferdinand, had been assassinated in Sarajevo. On July 23, Austria-Hungary — with Germany's full backing — handed Serbia an ultimatum with ten demands, written to be nearly impossible to accept. Serbia swallowed its pride and accepted almost all of them, refusing only to let Austrian officials conduct an investigation on Serbian soil.
It wasn't enough. Vienna wanted war — a small, local, punishing war, the kind of war empires still believed they could control.
So on July 28, Austria-Hungary declared war on Serbia. Emperor Franz Joseph signed the declaration; mobilization plans, rehearsed for years, clicked into motion like clockwork. At 1 a.m. on July 29, the first shots of the war were fired as the Austro-Hungarian monitor SMS Bodrog shelled Belgrade across the Danube River.
Then the dominoes fell. Russia, Serbia's ally, mobilized against Austria-Hungary. Germany declared war on Russia, then on France. And when German troops marched through neutral Belgium, Britain — bound by an old treaty guaranteeing Belgian neutrality — declared war on Germany too. Within days, what Vienna had imagined as a "small limited war" involving just two countries had become a continental catastrophe.
Tsar Nicholas II had tried to stop it, begging Kaiser Wilhelm II in a telegram: "An ignoble war has been declared on a weak country... I beg you in the name of our old friendship to do what you can to stop your allies from going too far." It didn't work. The alliances, the timetables, the pride — none of it could be switched off.
World War I redrew the map of the world, toppled four empires, and killed millions of people. And it began not with a grand invasion, but with one empire's decision that a small war would solve a big problem.
Photo: Le Petit Journal's 1914 illustrated depiction of the assassination of Archduke Franz Ferdinand and Duchess Sophie in Sarajevo — the trigger pulled one month before the war began (public domain), via Wikimedia Commons.
