Rashi on II Kings
In the ninth year of his reign. Of Tzidkiyohu.1Which corresponds to Nevuchadnetzar's seventeenth year.—Radak
Ralbag on II Kings
they built forts against it round about: These are towers that they built around the city to conquer it.
Rashi on II Kings
Siege towers. [Targum Yonoson] rendered כרקום [=works of siege].