The Greeks really started to invest in and expand Pompeii around 450 BC, but a couple of centuries later, it would ultimately pass into the control of the Roman Empire. By the year 78 AD, it was a large, affluent, well-to-do town in the Roman Empire, which was already more than 3x older than the modern-day United States.
Oh yeah, and it also sat right next to a giant volcano called Mount Vesuvius.
In 79 AD, Vesuvius erupted, releasing approximately 100,000x the energy of the atomics bombs that were dropped on Hiroshima and Nagasaki during WWII COMBINED. At this point in history, the Bay of Naples was already a densely populated area, which made this one of the deadliest eruptions in history. Pompeii, as well as a few other towns in the area, such as Herculaneum, were pretty much wiped off the map, their inhabitants burned and/or suffocated by the violent pyroclastic flows.
