But inactivity in these empires of the sword was always fraught with danger. Towards the close of his reign, if we read the somewhat obscure chronology of this period rightly, the eastern frontiers of his empire suffered several shocks. The Assyrian kingdom had been steadily gathering strength, and soon after 1320 B.C. Shalmaneser I. seems to have dispossessed the Hittite entirely of his suzerainty eastward of the Euphrates, ravaging all the kingless country of Mitanni as far as Carchemish.[802] Further north he even crossed the Euphrates and entered Khali-rabbat, capturing Malatia, just as a previous Assyrian monarch had done a hundred years before. In this campaign the Hittite forces sent against him seem to have been definitely defeated, and Shalmaneser penetrated as far as Muzri,[803] while his successor also invaded the district of Kummukh, which lay on the Hittite side of the Euphrates around Samsat. Egypt also, rejoicing in the re-establishment of a strong line of kings, was not long in taking advantage of this temporary weakening. Sety I. had hardly ascended the throne of the Pharaohs when he initiated a series of campaigns in the south of Syria, and erelong found himself able to beat back the Hittite forces, and to penetrate northwards as far as Tunip and the land of Naharain,[804] reaching possibly to the Euphrates. The early operations of his successor, Rameses II., however, seem to have extended only as far as the Lebanon,[805] where the Hittites were encountered; hence we may conclude that the latter had been able to regain their ascendency in northern Syria. In these critical times, with a great struggle inevitable and even imminent, Mursil died, and his son Mutallu succeeded to the Hittite throne.[806]