SUPPILULIUMA I

(reigned C. 1344–1322 B.C.)

Hittite king. He was responsible for the expansion of the Hittite empire into Upper Mesopotamia and Syria. Most important was his defeat of the kingdom of Mitanni, previously the most powerful state in this area. He sacked the Mitanni capital, Washshukanni, and appointed the Mitanni crown prince as his vassal ruler. He then asserted his authority over other Syrian states by attacking Aleppo, Amurru, and Alalakh, but he conducted a peace treaty with the Babylonian king (possibly Kadashman-Enlil I), whose daughter he married.