Bithynia et Pontus
Besides annexing Syria and turning Judea into a client kingdom and a satellite of Syria, Pompey annexed the coastal strip in the western part of the Kingdom of Pontus and merged it with Bithynia, turning both into the Roman province of Bithynia et Pontus. The kingdom of Bithynia had been bequeathed to Rome by its last king, Nicomedes IV, in 74 BC, triggering the Third Mithridatic War. During this war, it was not formally annexed. The territories Mithridates had conquered, apart for Lesser Armenia, became client states. The eastern coast and the interior of Pontus plus the Bosporan Kingdom became client kingdoms under Pharnaces II of Pontus, the son of Mithridates who had rebelled against his father and gone over to the Romans. Pompey installed Aristarchus as a client ruler in Colchis. He gave Lesser Armenia to Galatia under the Roman client king Deiotarus as a reward for his loyalty to Rome.