At that time
 When Jehoiachin reigned: 
 when the year was expired;
 so it is in ( 2 Chronicles 36:10 ) or at the revolution of the year; which some take to be autumn, the beginning of the civil year with the Jews; but rather it was the spring, the time when kings went out to battle, ( 2 Samuel 11:1 ) 
 the servants of Nebuchadnezzar king of Babylon came up against
 Jerusalem;
 that is, his army, under proper generals and officers, and by his orders: 
 and the city was besieged;
 in form by the Chaldean army.