Hattusili III
Kupanta-Kurunta apparently supported Hattusili III over Hattusili's nephew Urhi-Tessup, "Mursili III". After Hattusili attained the kingdom, Kupanta-Kurunta received a letter from Pharaoh Rameses II which was copied to Hattusili. In it, the Pharaoh reassured Kupanta-Kurunta that Egypt remained a full ally of Hatti and entertained no plans to aid Urhi-Tessup in any further adventures.