The Babylonians had seized the opportunity offered by the death of Tiglath-Pileser to shake off the Assyrian yoke. For five years they remained free. Then in B.C. 722 the country was occupied by a man of great energy and ability, Merodach-baladan, the son of Yagina.(9) Merodach-baladan was the hereditary chief of the Kaldâ or Chaldeans, a small tribe at that time settled in the marshes at the mouth of the Euphrates, but which, in consequence of his conquest of Babylon afterwards, became the dominant caste in Babylonia itself. For twelve years he continued undisputed master of the country we may henceforth call Chaldea. Sargon, however, was becoming every year more powerful, and it was evident that another Assyrian invasion of Babylonia would not be long postponed. Merodach-baladan determined to anticipate the attack. He therefore endeavoured to form a vast league between the states on both the eastern and the western sides of the Assyrian empire, whose independence was menaced by their powerful neighbour. Babylonia and Elam were the eastern members of the league, and ambassadors were sent to the west, to concert measures with the various states of Palestine, as well as with Egypt, for common action against Sargon. Hezekiah, now in the fourteenth year of his reign (2 Kings xx. 6), had just recovered from a dangerous illness, which had been aggravated by the fear of Assyria, and the fact that as yet he had no son to succeed him. The illness formed the pretext by which the conspirators hoped to blind the eyes of Sargon to the real objects of the embassy; it was published to the world that the ambassadors had come merely to congratulate the Jewish king on his recovery. But Sargon knew well that Merodach-baladan would not have troubled himself to enquire after the health of a brother-king without a further motive, and he doubtless learned that Hezekiah had shown the ambassadors all the treasures and arms with which he hoped to support the league. The consequence was, that before the confederates were prepared to resist him, the Assyrian monarch had swooped down upon them and attacked them singly.