For some decades, Babylon remains in subjection to Assyria, and although she regains her independence once more, and even a fair measure of her former glory, the power of the Cassites is broken.

Internal dissensions add to the difficulties of the situation and lead to the overthrow of the Cassites (1151 B.C.).

Native Babylonians once more occupy the throne, who, although able to check the danger still threatening from Elam, cannot resist the strong arms of Assyria.

At the close of the twelfth century Tiglathpileser I.secures a firm hold upon Babylonia, which now sinks to the position of a dependency upon the Assyrian kings.
V.
In contrast to Babylonia, which is from the start stamped as a civilizing power, Assyria, from its rise till its fall, is essentially a military empire, seeking the fulfillment of its mission in the enlargement of power and in incessant warfare.

Its history may be traced back to about 1800 B.C., when its rulers, with their seat in the ancient city of Ashur, first begin to make their presence felt.