Finally, a king named Adasi (1726-1701 BC) came to the fore c. 1726 BC and managed to quell the civil unrest and stabilize the situation in Assyria. Adasi completely drove the Babylonians and Amorites from the Assyrian sphere of influence during his reign, and Babylonian power began to quickly wane in Mesopotamia as a whole, also losing the far south of Mesopotamia (an area roughly corresponding to ancient Sumer) to the native Akkadian-speaking Sealand Dynasty, although the Amorites would retain control over a much reduced and weak Babylonia itself until 1595 BC, when they were overthrown by the Kassites, a people from the Zagros Mountains who spoke a language isolate and were neither Semites nor Indo-Europeans.