Piyassili.

About Piyassili

Piyassili, also known as Sarri-Kusuh, was a Hittite prince and a middle son of King Šuppiluliuma I—younger than the heir Arnuwanda II, but older than the eventual successor Muršili II and probably older than the ill-fated Zannanza too. After Šuppiluliuma concluded a treaty with Shattiwaza, son of King Tushratta of Mitanni, and married one of his daughters to him, Piyassili led a Hittite army that put Shattiwaza on the throne of Hanigalbat. According to Hittite sources, Piyassili and Shattiwaza crossed the Euphrates at Carchemish, then marched against Irridu, already in Hurrian territory. After having reduced Irridu and Harran, they continued east towards to Washukanni and perhaps conquered the capital Taite as well.