Jeremiah 39:1-2

Nebuchadnezzar and the Babylonian army captured Jerusalem and began its siege in 588 B.C. It took the Babylonians about eighteen months to breach the walls of the city, which they did in 586 B.C. (cf. Jeremiah 52:4-6). [Note: For discussion of the dates, see Feinberg, "Jeremiah," p. 621. Dyer, "Jeremiah," p. 1185, argued for the siege lasting just over 30 months. This was the total length of the siege including the period of respite previously mentioned.]