THE HUNS
Image from the movie Attila, 2001

The exact origin of the Huns is unknown. Many people have their theories but for each theory we have three anti-theories. For that reason, Encyclopaedia Britannica merely states that the Huns came from "beyond the Volga River."

Here is the Volga River (yellow arrows:)

376-395 - The Huns attack the Goths, who implore the protection
of the Roman emperor of the East. The Goths are allowed to pass
the Danube, and to settle in the Roman provinces. A war soon
breaks out between them and the Romans, and the emperor Valens
and his army are destroyed by them. They ravage the Roman
territories. The emperor Theodosius reduces them to submission.
They retain settlements in Thrace and Asia Minor.

The Huns played a big part in history from approximately 370 to 455. They were nomads and feared warriors. So they kicked butt as they went and acquired thus great wealth and a huge empire.

441 - The Huns attack the Eastern empire.

Famous king of the Huns was Attila.

View a map of Attila's empire.

And here is a map of the migration of the Huns

MIGRATION OF THE HUNS
Click map to enlarge

Roman Empire 5th Century: Routes of the Barbarian Invaders