 Muwatalli's son, Urhi-Teshub, took the throne and ruled as king for seven years as Mursili III before being ousted by his uncle, Hattusili III after a brief civil war.In response to increasing Assyrian annexation of Hittite territory, he concluded a peace and alliance with Ramesses II (also fearful of Assyria), presenting his daughter's hand in marriage to the Pharaoh.The "Treaty of Kadesh", one of the oldest completely surviving treaties in history, fixed their mutual boundaries in southern Canaan, and was signed in the 21st year of Rameses (c. 1258 BC).