According to Hittite sources, Piyassili and Shattiwaza crossed the Euphrates at Carchemish, then marched against Irridu, already in Hurrian territory.
"And all of the cities of the land of Carchemish, Murmurik, Shipri, Mazuwati and Šurun – these fortified cities– I gave to my son.
"[1] In fact, the whole former territory of Hanigalbat west of the Euphrates seems to have come under direct Hittite rule and was governed by Piyassili.
Piyassili fell ill and died before the ninth year of Muršili II's reign.
After it had been quelled, Piyassili's son was made king of Carchemish by his uncle Muršili II.