Hanniballinus and Delmatius were the young nephews of Constantine I who were made Caesar. After Constantine's death, his three sons Constantine II, Constantius II, and Constans inherited the empire. Delmatius was promoted to the rank of Caesar in A. D. 335 and given administrative control over the provinces of Thrace, Macedonia, and Greece.
There was a general purge of persons considered a threat to these three emperors shortly after Constantine's death and, since they were caesars and therefore in line for succession to the throne, Hanniballianus and his brother Delmatius were murdered along with several other people considered dangerous.
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