According to the later Suppiluliuma-Shattiwaza treaty, Suppiluliuma had made a treaty with Artatama II, a rival of Tushratta. Nothing is known of this Artatama's previous life or connection, if any, to the royal family. He is called 'king of the Hurri,' while Tushratta went by the title 'King of Mitanni.' This must have disagreed with Tushratta. Suppiluliuma began to plunder the lands on the west bank of the Euphrates, and annexed Mount Lebanon. Tushratta threatened to raid beyond the Euphrates if even a single lamb or kid was stolen.