313    Roman emperor Licinius unifies the entire Eastern Roman Empire under his rule.

314    Roman Emperor Licinius is defeated by his colleague Constantine I at the Battle of Cibalae, and loses his European territories.

317    Crispus and Constantine II, sons of Roman Emperor Constantine I, and Licinius Iunior, son of Emperor Licinius, are made ''Caesares''

324    Battle of Adrianople Constantine I defeats Licinius, who flees to Byzantium.

324    Constantine the Great decisively defeats Licinius in the Battle of Chrysopolis, establishing Constantine's sole control over the Roman Empire.

324    Licinius abdicates his position as Roman Emperor.