Mitanni people.
The successors of this kingdom's first ruler, Tudiya, were known as the "kings who lived in tents". This kingdom was revitalized after the Bronze Age Collapse by a law-giving king who repelled a Mushki invasion and who shares his name with a later king who defeated the northern Urartu people under Sarduri II. During the reign of Adad Nirari I, this kingdom started its policy of mass deportation of conquered (*)  Mitanni people. Its middle period ended with the reign of Tiglath Pileser I. At modern day Kouyunjik, a copy of the Enuma Elis was found at a library built by its last great king. Tukulti-Ninurta I brought the rival Babylonian king back to its capital of Assur. For 10 points, name this militant Mesopotamian civilization where Sennacherib ruled from Nineveh.
The successors of this kingdom's first ruler, Tudiya, were known as the "kings who lived in tents".
Assyria  [or  Assyrian  Empire;  Neo-Assyrian  Empire; or  Old Assyrian  Empire; or  Middle Assyrian  Empire] 