From these lists of date-formulæ, and from the dates themselves which are found upon the legal and commercial tablets of the period, we learn that Kish, Ka-sallu, and Isin all gave trouble to the earlier kings of the First Dynasty, and had in turn to be subdued. Elam did not watch the diminution of her influence in Babylonia without a struggle to retain it. Under Kudur-mabug, who was prince or governor of the districts lying along the frontier of Elam, the Elamites struggled hard to maintain their position in Babylonia, making the city of Ur the centre from which they sought to check the growing power of Babylon. From bricks that have been recovered from Mukayyer, the site of the city of Ur, we learn that Kudur-mabug rebuilt the temple in that city dedicated to the Moon-god, which is an indication of the firm hold he had obtained upon the city. It was obvious to the new Semitic dynasty in Babylon that, until Ur and the neighbouring city of Larsam had been captured, they could entertain no hope of removing the Elamite yoke from Southern Babylonia. It is probable that the earlier kings of the dynasty made many attempts to capture them, with varying success. An echo of one of their struggles in which they claimed the victory may be seen in the date-formula for the fourteenth year of the reign of Sin-muballit, Hammurabi’s father and predecessor on the throne of Babylon. This year was referred to in the documents of the period as “the year in which the people of Ur were slain with the sword.” It will be noted that the capture of the city is not commemorated, so that we may infer that the slaughter of the Elamites which is recorded did not materially reduce their influence, as they were left in possession of their principal stronghold. In fact, Elam was not signally defeated in the reign of Kudur-mabug, but in that of his son Rim-Sin. From the date-formulæ of Hammurabi’s reign we learn that the struggle between Elam and Babylon was brought to a climax in the thirtieth year of his reign, when it is recorded in the formulas that he defeated the Elamite army and overthrew Rim-Sin, while in the following year we gather that he added the land of E’mutbal, that is, the western district of Elam, to his dominions.