Source: Nelson's Complete Book of Bible Maps & Charts, Thomas Nelson Publishers, Nashville, TN; Holman QuickSource Bible Atlas, Holman Bible Publishers, Nashville, TN.
4 So in the ninth year of Zedekiah’s reign, on the tenth day of the tenth month, Nebuchadnezzar king of Babylon marched against Jerusalem with his whole army. They encamped outside the city and built siege works all around it.
5 The city was kept under siege until the eleventh year of King Zedekiah.
So on January 15, during the ninth year of Zedekiah's reign, King Nebuchadnezzar of Babylon led his entire army against Jerusalem. They surrounded the city and built siege ramps against its walls. Jerusalem was kept under siege until the eleventh year of King Zedekiah's reign.