Hello, I think that there shouldn't be too much units during battles.

[ISyncradar 33]

As I was reading the steam page, I saw that low morale can lead to retreat and reduced effectiveness. I think that this should also happen when units are overcrowded in a single battlefield because (1) not all of them are actively fighting, and (2) retreats are a huge scramble, resulting in bigger casualties. Another thing, I think that overcrowding would result in friendly fires or friendly casualties.