Even if his frontier touched Karduniash to the south, elsewhere he was separated from the few states strong enough to menace his kingdom by a strip of varying width, comprising several less important tribes and cities;--to the east and north-east by the barbarians of obscure race whose villages and strongholds were scattered along the upper affluents of the Tigris or on the lower terraces of the Iranian plateau: to the west and north-west by the principalities and nomad tribes, mostly of Aramoan extraction, who now for a century had peopled the mountains of the Tigris and the steppes of Mesopotamia. They were high-spirited, warlike, hardy populations, proud of their independence and quick to take up arms in its defence or for its recovery, but none of them possessed more than a restricted domain, or had more than a handful of soldiers at its disposal. At times, it is true, the nature of their locality befriended them, and the advantages of position helped to compensate for their paucity of numbers. [Illustration: 017.jpg THE ESCARPMENTS OF THE ZAB] Drawn by Boudier, from a photograph by M. Binder. Sometimes they were entrenched behind one of those rapid watercourses like the Radanu, the Zab, or the Turnat, which are winter torrents rather than streams, and are overhung by steep banks, precipitous as a wall above a moat; sometimes they took refuge upon some wooded height and awaited attack amid its rocks and pine woods. Assyria was superior to all of them, if not in the valour of its troops, at least numerically, and, towering in the midst of them, she could single out at will whichever tribe offered the easiest prey, and falling on it suddenly, would crush it by sheer force of weight. In such a case the surrounding tribes, usually only too well pleased to witness in safety the fall of a dangerous rival, would not attempt to interfere; but their turn was ere long sure to come, and the pity which they had declined to show to their neighbours was in like manner refused to them. The Assyrians ravaged their country, held their chiefs to ransom, razed their strongholds, or, when they did not demolish them, garrisoned them with their own troops who held sway over the country. The revenues gleaned from these conquests would swell the treasury at Nineveh, the native soldiers would be incorporated into the Assyrian army, and when the smaller tribes had all in turn been subdued, their conqueror would, at length, find himself confronted with one of the great states from which he had been separated by these buffer communities; then it was that the men and money he had appropriated in his conquests would embolden him to provoke or accept battle with some tolerable certainty of victory. Immediately on his accession, Assur-nazir-pal turned his attention to the parts of his frontier where the population was most scattered, and therefore less able to offer any resistance to his projects.*