Determined to crush the daring state, which, weak as it was, had yet ventured to revolt against him now for the fourth time, Nebuchadnezzar came in person, "he and all his host," against Jerusalem, and after overcoming and pillaging the open country, "built forts" and besieged the city.
Uaphris, upon this, learning the danger of his ally, marched out of Egypt to his relief; and the Babylonian army, receiving intelligence of his approach, raised the siege and proceeded in quest of their new enemy.

According to Josephus a battle was fought, in which the Egyptians were defeated; but it is perhaps more probable that they avoided an engagement by a precipitate retreat into their own country.

At any rate the attempt effectually to relieve Jerusalem failed.

After a brief interval the siege was renewed; a complete blockade was established; and in a year and a half from the time of the second investment, the city fell.
Nebuchadnezzar had not waited to witness this success of his arms.
The siege of Tyre was still being pressed at the date of the second investment of Jerusalem, and the Chaldaean monarch had perhaps thought that his presence on the borders of Phoenicia was necessary to animate his troops in that quarter.

If this was his motive in withdrawing from the Jewish capital, the event would seem to have shown that he judged wisely.