Nebuchadnezzar, the most important of the Chaldean, or Neo-Babylonian, kings, reigned from 605 to 562 BC. Although he is called Nebuchadnezzar in the Old Testament, his Babylonian name was Nabu-kudur-usur. Modern historians often refer to him as Nebuchadrezzar. There are few Old World names more famous than his. He was a great military leader and brilliant tactician and strategist. However, he is most remembered for building the great city of Babylon and destroying Jerusalem. The great monarch learned the art of war at an early age, going with his father to the campaigns against the Assyrians. From the veteran soldiers of Babylonia and Greek mercenaries he learned the tactics of the battlefield and siege methods.

This Babylonian king was a son of King Solomon and the Queen of Sheba. His first contact with the Jews happened in the time of his father-in-law Sennacherib, whom he accompanied on his campaign against Hezekiah. The destruction of the Assyrian army before the walls of Jerusalem, the great catastrophe from which only Nebuchadnezzar and four others escaped with their life, inspired him with fear of God. Later, in his capacity as secretary to the Babylonian king Merodach-baladan, it was he who called his master's notice to the mention of the Jewish king's name before the Name of God. "Thou callest Him 'the great God,' yet thou dost name Him after the king," he said. Nebuchadnezzar himself hastened after the messenger to bring back the letter and have it changed. He had advanced scarce three steps when he was restrained by the angel Gabriel, for even the few paces he had walked for the glory of God earned him his great power over Israel.

For eighteen years daily a heavenly voice resounded in the palace of Nebuchadnezzar, saying: "O thou wicked slave, go and destroy the house of thy Lord, for His children hearken not unto Him." But Nebuchadnezzar was beset with fears lest God prepare a fate for him similar to that of his ancestor Sennacherib. He practiced belomancy and consulted other auguries, to assure himself that he was against Jerusalem would result favorably. When he shook up the arrows, and questioned whether he was to go to Rome or Alexandria, not one arrow sprang up, but when he questioned about Jerusalem, one sprang up. He sowed seeds and set out planets; for Rome or Alexandria nothing came up; for Jerusalem everything sprouted and grew. He lighted candles and lanterns; for Rome or Alexandria they refused to burn, for Jerusalem they shed their light. He floated vessels on the Euphrates; for Rome or Alexandria they did not move, for Jerusalem they swam.

Still the fears of Nebuchadnezzar were not allayed. His determination to attack the Holy City ripened only after God Himself had shown him how He had bound the hands of the archangel Michael, the patron of the Jews, behind his back, in order to render him powerless to bring to his wards. So the campaign against Jerusalem was undertaken.