When you have units just out of control (101% ~ 149% of our max unit cap) you may finish tha battle w/o problems - I have so accumulated zounds of ghosts (after the battle I just moved the overcap units to my backup slot - gosts for free
) - the nuber counter is blue.
You can't end combat when your units go FRENZY ( they are real enemies - their count color is red, and they only attack you - as good behaving enemies) - now you can't finish the battle whan this happens - you need to fireball tham or anything - but hurry - as you can imagine that if you have i.e. 200% of your max red bats (and your leadership is 30K ) killing them in one turn is nearly impossible (killing the one half that is above your normal)