Mithridates VI Eupator 'the Great', king of Pontus

Mithridates VI Eupator 'the Great', king of Pontus, is remembered as one of the Roman Republic's most persistent enemies, despite only winning one major battle against a genuinely Roman army, at Zela in 67 B.C. During his reign he was responsible for turning Pontus into the dominant power on the Black Sea, but in the course of three wars against the Romans lost his kingdom, and died after being overthrown one of his own sons