Close commercial relations were also maintained between Elam and Sumer, and Gudea's conquest of Anshan may be regarded as the first step towards the Sumerian domination of the country. In establishing his own authority in Elam, Dungi must have found many districts, and especially the city of Susa, influenced by Sumerian culture, though chiefly through the medium of Semitic immigrants from Northern Babylonia. His task of administering the conquered provinces was thus rendered proportionately easier. That his expeditions were not merely raids, but resulted in the permanent occupation of the country, is proved by a number of tablets found at Tello, which throw considerable light upon the methods by which he administered the empire from his capital at Ur. Many of these documents contain orders for supplies allotted to officials in the king's service, who were passing through Lagash in the course of journeys between Ur and their districts in Elam. The tablets enumerate quantities of grain, strong drink and oil, which had been assigned to them, either for their sustenance during their stay in Lagash, or as provision for their journey after their departure. It is interesting to note that the towns or countries, from which they came, or to which they set out on their return journey from Ur, are generally specified. In addition to Susa, we meet with the names of Anshan, Kharishi, Kimash and Markharshi, the conquest or annexation of which by Dungi, as we have already seen, is recorded in the date-formulæ. Other places, the officials of which are mentioned, were Khukhnuri, Shimash, Sabu, Ulu, Urri, Zaula, Gisha, Siri, Siu, Nekhune, and Sigiresh. Like the preceding districts, these were all in Elam, while Az, Shabara, Simashgi, Makhar and Adamdun, with which other officers were connected, probably lay in the same region.[16] From the number of separate places, the names of which have already been recovered on the tablets from Tello, it is clear that Dungi's authority in Elam was not confined to a few of the principal cities, but was effectively established throughout the greater part of the country. While much of his administrative work was directed from Ur, it is probable that Susa formed his local capital. From inscriptions found during the French excavations on that site we know that Dungi rebuilt there the temple of Shushinak the national god,[17] and it may be inferred that he made the city his headquarters during his periods of residence in the country.