Original: Nabopolassar was followed by his son Nebuchadnezzar II, whose reign of 43 years made Babylon once more the mistress of the civilized world, including the conquering of Phoenicia in 585 BC.
Simplified: The king Nebuchadnezzar II, whose reign of 43 years made Babylon once more the mistress of the civilized world, conquered Phoenicia in 585 BC.