[Mobhack]

Rally points will direct the initial retreat towards them (if close enough, otherwise the map edge wins as far as I recollect). But then they will go for the left or right map edge as determined by the scenario side.

In addition the initial retreat from a burst of fire is almost always towards the appropriate map side for the player - so in a top-down scenario you can have infantry retreat from fire across the line of contact, so picking up additional shots at it.