During the long interval since the fall of the First Babylonian Dynasty, however, Western Asia had not been left masterless. Three other imperial powers had waxed and waned in her borders, of which one was destined to a second expansion later on. The earliest of these to appear on the scene established an imperial dominion of a kind which we shall not observe again till Asia falls to the Greeks; for it was established in Asia by a non-Asiatic power. In the earlier years of the fifteenth century a Pharaoh of the strong Eighteenth Dynasty, Thothmes III, having overrun almost all Syria up to Carchemish on the Euphrates, established in the southern part of that country an imperial organization which converted his conquests for a time into provincial dependencies of Egypt. Of the fact we have full evidence in the archives of Thothmes' dynastic successors, found by Flinders Petrie at Amarna; for they include many reports from officials and client princes in Palestine and Phoenicia.
If, however, the word empire is to be applied (as in fact we have applied it in respect of early Babylonia) to a sphere of habitual raiding, where the exclusive right of one power to plunder is acknowledged implicitly or explicitly by the raided and by surrounding peoples, this "Empire" of Egypt must both be set back nearly a hundred years before Thothmes III and also be credited with wider limits than those of south Syria. Invasions of Semitic Syria right up to the Euphrates were first conducted by Pharaohs in the early part of the sixteenth century as a sequel to the collapse of the power of the Semitic "Hyksos" in Egypt. They were wars partly of revenge, partly of natural Egyptian expansion into a neighbouring fertile territory, which at last lay open, and was claimed by no other imperial power, while the weak Kassites ruled Babylon, and the independence of Assyria was in embryo. But the earlier Egyptian armies seem to have gone forth to Syria simply to ravage and levy blackmail. They avoided all fenced places, and returned to the Nile leaving no one to hold the ravaged territory. No Pharaoh before the successor of Queen Hatshepsut made Palestine and Phoenicia his own. It was Thothmes III who first reduced such strongholds as Megiddo, and occupied the Syrian towns up to Arvad on the shore and almost to Kadesh inland--he who by means of a few forts, garrisoned perhaps by Egyptian or Nubian troops and certainly in some instances by mercenaries drawn from Mediterranean islands and coasts, so kept the fear of himself in the minds of native chiefs that they paid regular tribute to his collectors and enforced the peace of Egypt on all and sundry Hebrews and Amorites who might try to raid from east or north.