The Coincidental Sacking of Rome by Alaric
What happened
For the first time in exactly 800 years, the eternal city of Rome, Italy, fell to a foreign invader when Alaric and the Visigoths breached the Salarian Gate. This historic sacking occurred due to a series of absurd diplomatic blunders and a sudden internal mutiny by enslaved sympathizers who opened the gates from within. The psychological shock wave that rippled across the Mediterranean was immense, as citizens realized the supposedly invincible heart of the Western world was completely vulnerable.
Literary impact
This earth-shattering event directly prompted Saint Augustine to write his monumental work 'The City of God', transforming early Christian literature. It also sparked a wave of profoundly mournful elegiac poetry across the dying Roman Empire, as classical poets lamented the crumbling of civilization and the terrifying onset of a dark, uncertain dark age.
Source: Wikipedia