Another imperial weakness was even more fatal. So far as can be learned from Assyria's own records and those of others, she lived on her territorial empire without recognizing the least obligation to render anything to her provinces for what they gave--not even to render what Rome gave at her worst, namely, peace. She regarded them as existing simply to endow her with money and men. When she desired to garrison or to reduce to impotence any conquered district, the population of some other conquered district would be deported thither, while the new subjects took the vacant place. What happened when Sargon captured Samaria happened often elsewhere (Ashurbanipal, for example, made Thebes and Elam exchange inhabitants), for this was the only method of assimilating alien populations ever conceived by Assyria. When she attempted to use natives to govern natives the result was such disaster as followed Ashurbanipal's appointment of Psammetichus, son of Necho, to govern Memphis and the Western Delta.
Rotten within, hated and coveted by vigorous and warlike races on the east, the north and the south, Assyria was moving steadily towards her catastrophe amid all the glory of "Sardanapal." The pace quickened when he was gone. A danger, which had lain long below the eastern horizon, was now come up into the Assyrian field of vision. Since Sargon's triumphant raids, the Great King's writ had run gradually less and less far into Media; and by his retaliatory invasions of Elam, which Sennacherib had provoked, Ashurbanipal not only exhausted his military resources, but weakened a power which had served to check more dangerous foes.
We have seen that the "Mede" was probably a blend of Scythian and Iranian, the latter element supplying the ruling and priestly classes. The Scythian element, it seems, had been receiving considerable reinforcement. Some obscure cause, disturbing the northern steppes, forced its warlike shepherds to move southward in the mass. A large body, under the name Gimirrai or Cimmerians, descended on Asia Minor in the seventh century and swept it to the western edge of the plateau and beyond; others pressed into central and eastern Armenia, and, by weakening the Vannic king, enabled Ashurbanipal to announce the humiliation of Urartu; others again ranged behind Zagros and began to break through to the Assyrian valleys. Even while Ashurbanipal was still on the throne some of these last had ventured very far into his realm; for in the year of his death a band of Scythians appeared in Syria and raided southwards even to the frontier of Egypt. It was this raid which virtually ended the Assyrian control of Syria and enabled Josiah of Jerusalem and others to reassert independence.