Tigranes the Great
This kingdom reached its greatest height under Mithridates VI or Mithridates Eupator, commonly called the Great, who for many years carried on war with the Romans. Under him, the realm of Pontus included not only Pontic Cappadocia but also the seaboard from the Bithynian frontier to Colchis, part of inland Paphlagonia, and Lesser Armenia. Despite ruling Lesser Armenia, King Mithridates VI was an ally of Armenian King Tigranes the Great, to whom he married his daughter Cleopatra. Eventually, however, the Romans defeated both King Mithridates VI and his son-in-law, Armenian King Tigranes the Great, during the Mithridatic Wars, bringing Pontus under Roman rule.