Once fleeing troops have been moved victorious units will pursue. To find out how far they pursue roll 2D6 or 3D6 in the same way as for fleeing troops. Pursuers are moved the distance indicated straight forward. If the pursuers roll more than the distance fled by their enemy they are judged to have caught them, and the entire fleeing unit is overrun and destroyed. If the pursuers do not catch the fleeing unit then no further casualties are caused and the pursuers are simply moved the distance indicated towards their fleeing enemies. Where pursuers don't catch their foe but roll equally, leave a slight gap between the units to indicate this.
Note that units do not continue to pursue in subsequent turns; pursuit is a single bonus move which is made when a beaten enemy flees.