The gemarah megillah 3a expalians that were it not for the targum we would not understand the verse in Zecharya 12:11 which says there on that day the mourning in Jerusalem was like the mourning of Hadadrimon in the valley of Miggido. The targum explains that the pasuk is referring to the mourning for King Achav who was killed by Hadadrimon.
- Where does it say that there was any mourning (especially a great one) for king Achav?
- Rashi on Melachim alef 22:34 indicates that the man who killed Achav was Naaman. Is he arguing on the targum?