In 750 B.C. Umbadara was king of Elam; Khumbanigas was his successor in 742 B.C. In 720 B.C. the latter prince met the Assyrians under Sargon at Dur-ili in Yamutbal, and though Sargon claims a victory the result was that Babylonia recovered its independence under Merodach-baladan and the Assyrian forces were driven north.
The Dzungarian Ala-tau Mountains, which separate it from Kulja, extend south-west towards the river Ili, with an average height of 6000 ft.
The Trans-Ili Ala-tau and the Kunghei Ala-tau, stretch along the north shore of Lake Issyk-kul, both ranging from io,000 to 15,000 ft.
Another mountain-complex of much lower elevation runs north-westwards from the Trans-Ili Ala-tau towards the southern extremity of Lake Balkash.
The most important river is the Ili, which enters the province from Kulja and drains it for 250 m.