Our knowledge of the reigns immediately following is scanty. Babylonia asserted her independence and the Assyrian king had a difficult task to hold the empire together. Determined to recover the kingdom to the south, he marched against its capital while its king was distant with his army. Cut off from Babylon, the king appealed to the Medes for aid. They cared not at all to help the Babylonian, but they hated with undying hatred the very name of Assyria. Their numbers had often been increased by refugees, driven from their homes by Assyrian armies, and they themselves had experienced defeat at the hands of Assyrian troops. The possibility of crippling the great power of Asia stimulated them to aid the Babylonians. They soon repulsed the Assyrian army near Babylon and drove it north. Still they pursued the fleeing army and forced the king and his army to retire into Nineveh. At last the fate the Assyrians had so often meted out to others was measured out to them. Great wealth was stored in Nineveh, and this the besieging army wished for themselves. The walls were strong and were long defended, but an assault finally carried all before it. Nineveh, built by the wealth of spoils, beautified by plunder from the known world, became the spoils of the Medes, who stripped the temples and palaces and then set fire to the city. Nineveh fell in 606 B.C. The Assyrians were scattered to the four winds and grass grew over the once smoking ruins. Two hundred years later, when Xenophon led his army over this spot on his return to Greece, none knew that they passed over the site of the once great world-city. The civilization developed by the Babylonians had been passed on to the Assyrians. It was now left a heritage for the Chaldeans, to whom descended the legacies of both countries, and in turn they dominated the valley of the Euphrates. As for Assyrian greatness, so far-reaching and wide, the Hebrew told the story in poetic language centuries ago, and today none could set it forth more vividly. "Behold, the Assyrian was a cedar in Lebanon with fair branches, and with a shadowing shroud, and of an high stature; and his top was among the thick boughs. The waters made him great, the deep set him up on high, with her rivers running round about his plants and sent out her little rivers unto all the trees of the field. Therefore his height was exalted above all the trees of the field, and his boughs were multiplied, and his branches became long because of the multitude of waters, when he shot forth.