I'm my game we played out a battle, and a unit was hit and dropped its
missile rating down to 0. Now does that mean its rating is 0 but can still
attack, or its rating is 0 and can no longer attack usings missiles?

We decided that 0 means you can still attack. Guess what happened? I attacked
a defense 3 infantry unit with my missile 0 archer. We matched up our Icons
and at 0 a miss, at -1 a miss, at -2 a miss, and at my -3 a hit! How's that
for randomness!? I guess that unit was lucky... However it was crushed after
that by some cavalry charging into it. Oh well, a minor morale boost while it