When at length the new king had stamped out the last embers of revolt within the kingdom, he had to undertake the reconquest of those provinces which in the interval had thrown off their allegiance to Assyria. Urartu in the north had grown more aggressive, the Syrians were openly defiant, the Medes were conducting bold raids, and the Babylonians were plotting with the Chaldaeans, Elamites, and Aramaeans to oppose the new ruler. Shamshi-Adad, however, proved to be as great a general as his father. He subdued the Medes and the Nairi tribes, burned many cities and collected enormous tribute, while thousands of prisoners were taken and forced to serve the conqueror. Having established his power in the north, Shamshi-Adad then turned attention to Babylonia. On his way southward he subdued many villages. He fell upon the first strong force of Babylonian allies at Dur-papsukal in Akkad, and achieved a great victory, killing 13,000 and taking 3000 captives. Then the Babylonian king, Marduk-balatsu-ikbi, advanced to meet him with his mixed force of Babylonians, Chaldaeans, Elamites, and Aramaeans, but was defeated in a fierce battle on the banks of the Daban canal. The Babylonian camp was captured, and the prisoners taken by the Assyrians included 5000 footmen, 200 horsemen, and 100 chariots. Shamshi-Adad conducted in all five campaigns in Babylonia and Chaldaea, which he completely subdued, penetrating as far as the shores of the Persian Gulf. In the end he took prisoner the new king, Bau-akh-iddina, the successor of Marduk-balatsu-ikbi, and transported him to Assyria, and offered up sacrifices as the overlord of the ancient land at Babylon, Borsippa, and Cuthah. For over half a century after this disaster Babylonia was a province of Assyria. During that period, however, the influence which it exercised over the Assyrian Court was so great that it contributed to the downfall of the royal line of the Second Empire. CHAPTER XVIII. THE AGE OF SEMIRAMIS