One of the main directions of the Eastern policy of Augustus (27 B.C.-14 A.C.) represented uniting of the strategically important Black Sea Coast countries under one power against Parthia-Armenia. This action would have been the best means of enforcing the positions of Rome in this region. With the help of the Rome vassal, the king of Pontus Polemo I mounts Bosporus throne in 14 B.C. and thus unites Pontus and Bosporus under the aegis of Rome. But the attempt of creation of united Pontus-Bosporus kingdom was unsuccessful in 8 B.C. and after the death of Polemo, Bosporus separated from the Pontus kingdom. Though, Augustus managed to recover this failure by diplomatic means. According to the desire of Augustus, in 3/2 B.C. Pythodoris, the widow of Polemo, married Archelaos, the king of Cappadocia. Afterwards a more powerful bridgehead against Parthia was created on the Eastern border of Rome – united kingdom of Pontus-Cappadocia.