Instructions: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Input: The commander of the losing force at this battle advanced from Melanthias following the orders of a man named Sebastian, while the Sarmatian commander Victor argued against any action. According to historian Charles Oman, this battle cemented the strength of the cavalry formation and changed the style of warfare for the Roman army, and in this battle a legion of scutarii was commanded by Bacurius the Iberian. This battle was preceded by the Battle of the Willows, and the winning commander at this battle was aided by the generals Alatheus and Saphrax. Taking place after a certain tribe crossed the Danube and won by the commander Fritigern, this battle left Gratian and Valentinian II in charge of the empire. For 10 points, identify this disastrous defeat of the Roman army which saw the death of the emperor Valens, a victory for the Goths in 378 A.D.
Output:
History