The country's new foe was her old rival Elam, who more than once before had by successful invasion affected the course of Babylonian affairs. But on this occasion she did more than raid, harry, and return: she annexed the city of Larsa, and by using it as a centre of control, attempted to extend her influence over the whole of Sumer and Akkad. It was at the close of Apil-Sin's reign at Babylon that Kudur-Mabuk, the ruler of Western Elam, known at this period as the land of Emutbal, invaded Southern Babylonia and, after deposing Sili-Adad[72] of Larsa, installed his own son Warad-Sin upon the throne. It is a testimony to the greatness of this achievement, that Larsa had for some time enjoyed over Nîsin the position of leading city in Sumer. Nûr-Adad, the successor of Sumu-ilum, had retained control of the neighbouring city of Ur, and, though Enlil-bani of Nîsin had continued to lay claim to be King of Sumer and Akkad, this proud title was wrested from Zambia or his successor by Sin-idinnam, Nur-Adad's son.[73] Sin-idinnam, indeed, on bricks from Muḳayyar in the British Museum makes a reference to the military achievements by which he had won the position for his city. In the text his object is to record the rebuilding of the Moon-god's temple in Ur, but he relates that he carried out this work after he had made the foundation of the throne of Larsa secure and had smitten the whole of his enemies with the sword.[74] It is probable that his three successors on the throne, who reigned for less than ten years between them, failed to maintain his level of achievement, and that Sin-magir recovered the hegemony for Nîsin.[75] But Ur, no doubt, remained under Larsa's administration, and it was no mean nor inferior city that Kudur-Mabuk seized and occupied.