1)
Which cities will He destroy?
1.
Rashi citing Targum Yonasan: I will remove your enemies. Also "u'Mal'u Pnei Sevel Arim" (Yeshayah 14:21) and "va'Yhi Arecha" (Shmuel I, 28:16).
2.
Radak: We can explain like I explained "v'Hichrati Arei Artzecha" (10; you will not need them).
3.
Malbim: Cities in which they served idolatry. They will be like Arim ha'Nidachos (totally destroyed).
