The king who laid the foundations of the greatness of this dynasty was Subbiluliuma, the next king, whose conquests over the Mitanni and Harri we have already traced. He conquered also a number of neighboring states, and compelled them to sign with him treaties of alliance which made them his vassals. Chronicles of these events were discovered by Winckler among the clay tablets found at Boghaz Koi. Subbiluliuma also turned his armies southward and conquered Syria down to the confines of Palestine. These conquests were in progress when some of the El-Amarna letters, written to Amenophis IV of Egypt and translated in Part II, p. 344, ff., were written. Here he pursued the same policy that he had pursued in Mesopotamia, and compelled the conquered countries to enter into treaties with him, which subjugated them to his will. Among the kings so treated was the Amorite King Aziru, who at that time ruled Amorites living in the southern part of the valley between the Lebanon mountain ranges and in the region afterward occupied by the tribe of Asher. They also held some of the southern Phœnician cities. This represents the most southerly extension of Subbiluliuma’s power. Whether Subbiluliuma also extended his conquests to the west of Asia Minor, we have no means of knowing. Some scholars suppose that he had done so before he began the conquest of Mitanni. Certain it is that Hittite rock sculptures of gigantic size exist in the mountains near Smyrna and Manissia, to the west of Sardis. These sculptures represent the great Hittite goddess. Near Smyrna there are also the remains of great buildings. We know of no Hittite monarch who would be so likely to have carried Hittite power to these parts as Subbiluliuma. If he did so, possibly in later time the Hittites here became independent. At all events, some centuries later they were known to Ionian Greeks in this region, for Homer’s _Odyssey_, Book XI, line 521, records the tradition that some Hittites were killed with Eurypylos.