Discovering Rome's Eastern Frontier

The eastern frontier of the Roman Empire extended from northern Syria to the western Caucasus, across a remote and desolate region 800 miles from the Aegean. It followed the great Euphrates valley to penetrate the harsh mountains of Armenia Minor and south of the Black Sea, along the Pontic coast to the finally reach the foothills of the Caucasus. Though vast, this terrain has long remained one of...