to that great province. II. They relinquished to the Romans five provinces beyond the Tigris. ^79 Their situation formed a very useful barrier, and their natural strength was soon improved by art and military skill. Four of these, to the north of the river, were districts of obscure fame and inconsiderable extent; Intiline, Zabdicene, Arzanene, and Moxoene; ^! but on the east of the Tigris, the empire acquired the large and mountainous territory of Carduene, the ancient seat of the Carduchians, who preserved for many ages their manly freedom in the heart of the despotic monarchies of Asia. The ten thousand Greeks traversed their country, after a painful march, or rather engagement, of seven days; and it is confessed by their leader, in his incomparable relation of the retreat, that they suffered more from the arrows of the Carduchians, than from the power of the Great King. ^80 Their posterity, the Curds, with very little alteration either of name or manners, ^* acknowledged the nominal sovereignty of the Turkish sultan. III. It is almost needless to observe, that Tiridates, the faithful ally of Rome, was restored to the throne of his fathers, and that the rights of the Imperial supremacy were fully asserted and secured. The limits of Armenia were extended as far as the fortress of Sintha in Media, and this increase of dominion was not so much an act of liberality as of justice. Of the provinces already mentioned beyond the Tigris, the four first had been dismembered by the Parthians from the crown of Armenia; ^81 and when the Romans acquired the possession of them, they stipulated, at the expense of the usurpers, an ample compensation, which invested their ally with the extensive and fertile country of Atropatene. Its principal city, in the same situation perhaps as the modern Tauris, was frequently honored by the residence of Tiridates; and as it sometimes bore the name of Ecbatana, he imitated, in the buildings and fortifications, the splendid capital of the Medes. ^82 IV. The country of Iberia was barren, its inhabitants rude and savage. But they were accustomed to the use of arms, and they separated from the empire barbarians much fiercer and more formidable than themselves. The narrow defiles of Mount Caucasus were in their hands, and it was in their choice, either to admit or to exclude the wandering tribes of Sarmatia, whenever a rapacious spirit urged them to penetrate into the richer climes of the South. ^83 The nomination of the kings of Iberia, which was resigned by the Persian monarch to the emperors, contributed to the strength and security of the Roman power in Asia. ^84 The East enjoyed a profound tranquillity during forty years; and the treaty between the rival monarchies was strictly observed till the death of Tiridates; when a new generation, animated with different views and different passions, succeeded to the government of the world; and the grandson of Narses undertook a long and memorable war against the princes of the house of Constantine.
[Footnote 77: By an error of the geographer Ptolemy, the position of Singara is removed from the Aboras to the Tigris, which may have produced the mistake of Peter, in assigning the latter river for the boundary, instead of the former. The line of the Roman frontier traversed, but never followed, the course of the Tigris.
Note: There are here several errors. Gibbon has confounded the streams, and the towns which they pass. The Aboras, or rather the Chaboras, the Araxes of Xenophon, has its source above Ras-Ain or Re-Saina, (Theodosiopolis,) about twenty-seven leagues from the Tigris; it receives the waters of the Mygdonius, or Saocoras, about thirty-three leagues below Nisibis. at a town now called Al Nahraim; it does not pass under the walls of Singara; it is the Saocoras that washes the walls of that town: the latter river has its source near Nisibis. at five leagues from the Tigris. See D'Anv. l'Euphrate et le Tigre, 46, 49, 50, and the map.
To the east of the Tigris is another less considerable river, named also the Chaboras, which D'Anville calls