Jeremiah 39:2

39:2 It lasted until the ninth day of the fourth month of Zedekiah’s eleventh year. ¹  On that day they broke through the city walls.

Jeremiah 52:7

52:7 They broke through the city walls, and all the soldiers tried to escape. They left the city during the night. They went through the gate between the two walls that is near the king’s garden. ²  (The Babylonians had the city surrounded.) Then they headed for the Jordan Valley. ³ 

[39:2]  ¹ sn According to modern reckoning that would have been July 18, 586 b.c. The siege thus lasted almost a full eighteen months.

[52:7]  ² sn The king’s garden is mentioned again in Neh 3:15 in conjunction with the pool of Siloam and the stairs that go down from the city of David. This would have been in the southern part of the city near the Tyropean Valley which agrees with the reference to the “two walls” which were probably the walls on the eastern and western hills.

[52:7]  ³ sn Heb “toward the Arabah.” The Arabah was the rift valley north and south of the Dead Sea. Here the intention was undoubtedly to escape across the Jordan to Moab or Ammon. It appears from 40:14; 41:15 that the Ammonites were known to harbor fugitives from the Babylonians.