Quote Originally Posted by Grey_Fox

It looks like the billmen are suffering from the squeeze penalty, which is when you have two units on top of each other, they only fight at half effect.
I have not seen any details about a "squeeze penalty". I searched the forums using the term but couldn't find anything.

Can someone elaborate on when and how this comes into effect and how specifically to avoid it? I frequently find that I have units clustered in a pitched battle. Should I take special care to make sure they are not mixing?