[quote=@KoL]
Well, there are varies for this to be happening, but indeed, air power alone can't do it, when you add mechas (some of them even fly on their own) to the mix, the picture changes quite drastically.
[/quote]

An urban environment is the one area where mechs would be more useful practically than actual tanks and such, at least if we were working by the normal rules of warfare/reality.