History of the Roman Empire
Theodosius was the last Emperor who ruled over the whole Empire. After his death in 395, he gave the two halves of the Empire to his two sons Arcadius and Honorius; Arcadius became ruler in the East, with his capital in Constantinople, and Honorius became ruler in the West, with his capital in Milan and later Ravenna. The Roman state would continue to have two different emperors with different seats of power throughout the 5th century, though the Eastern Romans considered themselves to be the only ones who were fully Roman. Latin was used in official writings as much as, if not more than, Greek and the two halves were nominally, culturally and historically, if not politically, the same state.
Herules
Along with many other people they reappear in the written records as one of many groups from the east who were struggling for supremacy on the left bank of the middle Danube after the death of Attila, in the area stretching from modern Bavaria to modern Hungary. They established their own kingdom and many joined Odoacer, who deposed the last Western Roman Emperor Romulus Augustus in 476 AD. They became well known both as soldiers in various Roman armies, in the Italian kingdom of Odoacer, and as sea raiders on the Atlantic coast, before fading out of history. The Danubian kingdom broke up and remnants settled in the Balkans and other places. The last known political entity which was described as Herulian seem to have been in the area of modern Belgrade in the 550s, as a settlement within the Roman Empire and under Roman control.