What singular event has had the biggest effect on European history?

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>>2512973

Treaty of Westphalia

The beginning of the universe... But actually, the french revolution

>>2512973
conversion of Rome from paganism to christianity

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'Homer' writing the iliad/odyssey

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Adolph Hitler eating that second piece of wedding cake before blowing his bride's brains out

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>>2512973
Battle of Metaurus -- throughout the course of the Second Punic War Hannibal had been smacking the Romans up and down the Italian peninsula, pulling insane victories out of his ass even while he was horribly outnumbered. However what he didn't have was siege equipment, and for them to encircle a city and start constructing them, they would have run out of food and been harassed by the Roman consular army. So for many years Hannibal simply moved around in Italy taking what he wanted and smashing whatever army Rome threw at him hoping to break the resolve of the Roman allies through impressive victories, but the allies were holding firm

Despite losses in Iberia the Carthaginian Oligarchs finally funded reinforcements for Hannibal under the leadership of his brother Hasdrubal, and this time they brought siege equipment. With 30,000 fresh soldiers his army would have outnumbered the Consular army for the first time in the war and be in possession of the resources to assault Rome directly

What happened next was that singular fluke which altered the course of world history: a Carthaginian messenger took a wrong turn and ended up in Roman hands, and the Romans now knew the existence of the reinforcements, their exact location, how many there were, and the route which they were marching. At 47,000 men the combined armies of both Consuls easily outnumbered them, and they timed the battle to take place when all of the Romans were fresh while all of the Carthaginians were exhausted from the march. Outmanned and outmaneuvered, the Carthaginians were slaughtered, and so too was their last real chance at securing victory

Had the messenger gone the right way Rome would have been oblivious to Hasdrubal, and by the time Hannibal marched his now massive army to Rome's doorstep and began deploying towers it would have been too late, Rome would have been captured, sacked, her alliances disbanded, and it would not have gone on to dominate the world the way it did

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>>2513110
IN HOC SIGNO VINCES MOTHERFUCKER

The Black Plague

>>2512973
Definitely the assassination of the archduke. Yes, war was likely a given regardless of what happened, but the exact sequence and nature of the war and everything that occurred after would have been irrevocably altered had Princip not shot Ferdinand that day.

OP sucking his own dick

The Hellenes defeat of the Persian invasion

>>2512973
Fall of Western Roman Empire obviously.
all else is obsolete.

>>2514005
fucking furries ruining everything

>>2513110
>single event
>took Christians over 100 years

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>>2514396
Founding of Rome 2.0

>>2514431
What is American History?