Of all his expeditions, that undertaken in his thirty-third year was perhaps the most remarkable. Starting from the country of the Rutennu, he on this occasion directed the main force of his attack upon the Mesopotamian region, which he ravaged far and wide, conquering the towns, and "reducing to a level plain the strong places of the miserable land of Naharaïn," capturing thirty kings or chiefs, and erecting two tablets in the region, to indicate its subjection. It is possible that he even crossed the Tigris into Adiabene or the Zab country, since he relates that on his return he passed through the town of Ni or Nini, which many of the best historians of Egypt identify with Nineveh. Nineveh was not now (about B.C. 1500) the capital of Assyria, which was lower down the Tigris, at Asshur or Kileh Sherghat, but was only a provincial town of some magnitude. Still it was within the dominions of the Assyrian monarch of the time, and any attack upon it would have been an insult and a challenge to the great power of Upper Mesopotamia, which ruled from the alluvium to the mountains. It is certain that the king of Assyria did not accept the challenge, but preferred to avoid an encounter with the Egyptian troops. Both at this time and subsequently he sent envoys with rich presents to court the favour of Thothmes, who accepted the gifts as "tribute," and counted "the chief of Assuru" among his tributaries. Submission was also made to him at the same time by the "prince of Senkara," a name which still exists in the lower Babylonian marsh region. Among the gifts which this prince sent was "lapis lazuli of Babylon." It is an exaggeration to represent the expedition as having resulted in the conquest of the great empires of Assyria and Babylon; but it is quite true to say that it startled and shook those empires, that it filled them with a great fear of what might be coming, and brought Egypt into the position of the principal military power of the time. Assyrian influence especially was checked and curtailed. There is reason to believe, from the Egyptian remains found at Arban on the Khabour,[17] that Thothmes added to the Egyptian empire the entire region between the Euphrates and its great eastern affluent--a broad tract of valuable territory--and occupied it with permanent garrisons. The Assyrian monarch bought off the further hostility of his dangerous neighbour by an annual embassy which conveyed rich gifts to the court of the Pharaohs, gifts that were not reciprocated. Among these we find enumerated gold and silver ornaments, lapis lazuli, vases of Assyrian stone (alabaster?), slaves, chariots adorned with gold and silver, silver dishes and silver beaten out into sheets, incense, wine, honey, ivory, cedar and sycomore wood, mulberry trees, vines, and fig trees, buffaloes, bulls, and a gold habergeon with a border of lapis lazuli.