Ush is mentioned in various inscriptions, such as the Cone of Entemana as having violated the frontier with Lagash, a frontier which had been solemnly established by king Mesilim.[1]
8–12
𒈨𒁲 𒈗𒆧𒆠𒆤 𒅗 𒀭𒅗𒁲𒈾𒋫 𒂠 𒃷 𒁉𒊏 𒆠𒁀 𒈾 𒉈𒆕
me-silim lugal kiški-ke4inimdištaran-na-ta eš2 gana2 be2-ra ki-ba na bi2-ru2
"Mesilim, king of Kiš, at the command of Ištaran, measured the field and set up a stele there." 13–17 𒍑 𒉺𒋼𒋛 𒄑𒆵𒆠𒆤 𒉆 𒅗𒈠 𒋛𒀀𒋛𒀀𒂠 𒂊𒀝
uš ensi2 ummaki-ke4 nam inim-ma diri-diri-še3 e-ak
"Ush, ruler of Umma, acted unspeakably." 18–21 𒈾𒆕𒀀𒁉 𒉌𒉻 𒂔 𒉢𒁓𒆷𒆠𒂠 𒉌𒁺
na-ru2-a-bi i3-pad edin lagaški-še3 i3-g̃en
"He ripped out that stele and marched toward the plain of Lagaš."
Extract from the Cone of Enmetena, Room 236 Reference AO 3004, Louvre Museum.[2][3]
According to Enmetena's account, Ush is the one who invaded the territory of Lagash, and his invasion was then repelled, although the name of the ruler of Lagash who confronted him that time is not mentioned explicitly:[4]
"Ninta (“Uš”), the governor of Umma, turned the matter into something that exceeds (any) word. He smashed that stela and marched on the plain of Lagash. Ningirsu, the warrior of Enlil, at his just command, did battle with Umma. At Enlil’s command, he spread the great throwing-net over it, and set up burial mounds for it on the plains.”
It is thought that Ush was severely defeated by Eannatum, king of Lagash.[5] The victory of Eannatum is mentioned in a fragmentary inscription on the stele, suggesting that after the loss of 3,600 soldiers on the field, Ush, king of Umma, was killed in a rebellion in his capital city of Umma:
"(Eanatum) defeated him. Its (Umma's) 3600 corpses reached the base of heaven (...) raised (their) hands against him and killed him in Umma"