As the Babylonian army attacks the city, King Nebuchadnezzar himself arrives at the scene. His military forces are already in the middle of an active siege, locking down the area completely.
The king's troops surround the city from every possible direction, creating a total blockade. This strategy is designed with a clear and brutal purpose. By trapping the people inside and cutting them off from the outside world, the invading army intends to create severe hardship, forcing the inhabitants to endure deep distress and suffering.