 In the 4th century, the emperor Valentinianus spent much of his reign defending the Danube frontier against a mixed horde of Sarmatians, Goths, and Quadi under their king Gabinius, because a Quadi king was slain at a treaty table by the Roman Marcellinus, son of the praefect of Gaul, Maximinus.Valentinian died in 375 after having received a deputation of Quadi to discuss a treaty.The insolent behavior of the proud barbarians so enraged the emperor, apparently, that he died of a stroke.