rzgrz:a nuke is a nuke. If It cant destroy a whole two cities. then its not a nuke.
It is called a nuke because it contains radioactive elements, just like some nuclear power plants (homemade ones) can only power a toaster. It is the type of energy it harnesses that defines the type of bomb it is, not the size of the explosion.
Ninja, are you saying that all units would have the bomb and you could choose to deploy it from them, or that they would be on missles?
If it is the first, it doesn't make logical sense as the UNSC could/would not waste so many bombs (they would fall unused with the soldiers carrying them). If it is the latter, then it is pretty much an equivalent to a mac round plus EMP. So, I guess the latter would work as it would allow it to be launched from the "ground" (vehicle, building, aircraft; but not the orbiting scape ship(s)).
A Halo Wars Story: Once upon a time, there was a light bridge. On that light bridge, there were many covenant. When the UNSC turned the bridge off, the covenant fell. The End.