BATTLE OF ADRIANOPLE
August 9, 378

Adrianople is the old name for present day Edirne in northwest Turkey.

The Battle of Adrianople was fought between

the Visigoths, led by Fritigern,

and

the Romans, led by Emperor Valens.

The Visigoths won and Valens got himself killed.

Here is more about the Visigoths.

Map of the Battle of Adrianople AD 378