The fate of Ush, the patesi of Umma, who had brought such misfortune on his own city by the rash challenge he had given Lagash, is not recorded; but it is clear he did not remain the ruler of Umma. He may have been slain in the battle, but, even if he survived, he was certainly deprived of his throne, possibly at the instance of Eannatum. For Entemena records the fact that it was not with Ush, but with a certain Enakalli, patesi of Umma, that Eannatum concluded a treaty of peace.[6] The latter ruler may have been appointed patesi by Eannatum himself, as, at a later day, Ili owed his nomination to Entemena on the defeat of the patesi Urlumma. But, whether this was so or not, Enakalli was certainly prepared to make great concessions, and was ready to accept whatever terms Eannatum demanded, in order to secure the removal of the troops of Lagash from his city, which they doubtless continued to invest during the negotiations. As might be expected, the various terms of the treaty are chiefly concerned with the fertile plain of Gu-edin, which had been the original cause of the war. This was unreservedly restored to Lagash, or, in the words of the treaty, to Ningirsu, whose "beloved territory" it is stated to have been. In order that there should be no cause for future dispute with regard to the boundary-line separating the territory of Lagash and Umma, a deep ditch was dug as a permanent line of demarcation. The ditch is described as extending "from the great stream" up to Gu-edin, and with the great stream we may probably identify an eastern branch of the Euphrates, through which at this period it emptied a portion of its waters into the Persian Gulf. The ditch, or canal, received its water from the river, and, by surrounding the unprotected sides of Gu-edin, it formed not only a line of demarcation but to some extent a barrier to any hostile advance on the part of Umma.