Excerpts from Books and Wikipedia
"Mitanni (...), also called Hanigalbat (...) in Assyrian or Naharin in Egyptian texts, was a Hurrian-speaking state in northern Syria and southeast Anatolia from c. 1500 to 1300 BC. Mitanni came to be a regional power after the Hittite destruction of Amorite Babylon and a series of ineffectual Assyrian kings created a power vacuum in Mesopotamia. At the beginning of its history, Mitanni's major rival was Egypt under the Thutmosids. However, with the ascent of the Hittite Empire, Mitanni and Egypt struck an alliance to protect their mutual interests from the threat of Hittite domination. . . . The Mitanni dynasty ruled over the northern Euphrates-Tigris region between c. 1475 and c. 1275 BC. Eventually, Mitanni succumbed to Hittite and later Assyrian attacks and was reduced to the status of a province of the Middle Assyrian Empire. While the Mitanni kings were Indo-Aryan, they used the language of the local people, which was at that time a non-Indo-European language, Hurrian. Their sphere of influence is shown in Hurrian place names, personal names and the spread through Syria and the Levant of a distinct pottery type." [Wikipedia]