What is "shu-sin"

Shu-sin was king of Sumer and Akkad, and was the penultimate king of the Ur III dynasty. He succeeded his brother Amar-Sin, and reigned c. 1972-1964 BC. ( short chronology)

Following an open revolt of his Amorite subjects, he directed the construction of a fortified wall between the Euphrates and the Tigris rivers in his fourth year, intending it to hold off any further Amorite attacks. He was succeeded by his son Ibbi-Sin.