how does really route works ?

[liga]

I was thinking to have understand quite a lot about route ... but something happens that make me feel really newbie again!

I have an army with 2 leaders:

- my pretenders + 40 militia
- a mage with 4 bodyguards

I set order to attak both to my pretender and militia ... the miltia is heavy damaged by arrows and start to route and ... my pretender (undamaged) do the same and than all the army (also the undamaged mage and his modyguards).

I was thinking that every squad was independent ofr morale and route purpose and also the leader ... so, what was happening ? I sthere someone that could explain me weel how the morale and route works ?

thkx
Liga