The development of the Roman provinces in Asia Minor (2nd cent. BC to 5th cent. AD)
The bewildering frequency with which provincial frontiers in Asia Minor were moved, new provinces founded and provinces merged only to be separated again clearly betrays both the intractability and the importance of this peninsula to the Roman Empire. It was essential to defend the economic potency of the Anatolian provinces continuously against the covetous Parthians (and, from AD 227, Sassanids) at the Euphrates and Tigris. To do this, it was necessary to secure the military deployment route from the Danube to the Euphrates, which led along the southern shore of the Black Sea.