The line between the history of the ancient world and the Middle Ages is?

Historians claim that the ancient world ended its existence with the fall of the Roman Empire. Then the countdown of the Middle Ages begins. This event happened in the fifth century, namely in the year 476. There were tribes constantly raiding Rome. The barbarians began to unite, their statehood arose and the Roman Empire could no longer control and restrain them. Migration of peoples took place. All this led to the destruction of the Roman Empire and the formation of medieval states.