Valentinian I. ( 321-375 A.D.), Roman Emperor, born in Pannonia, was raised to the purple in 364, and was occupied during the whole of his reign in resisting the encroachments of the barbarians. His son, Valentinian II. (371-392 A.D.), succeeded him when he was four years old. He gained victories in Italy, Illyricum, and Africa, but was in 387 swept out of Italy by Maximus. He was restored to his kingdom later, and was murdered in 392 by Arbogastes. His grand-nephew Valentinian III. (419-455), made incessant war on the Vandals, Goths, and Huns, who succeeded in wresting territory from him. His career was practically undistinguished.