The pursuing unit pivots to face the centre of the fleeing unit and moves directly forward equal to its pursuit roll. It will stop 1" away from any friendly units or impassable terrain, and will charge an enemy in the way.
With the final position of the fleeing unit now determined, it's time to move the pursuers. Turn the pursuing unit about its centre (ignoring other units) so that it is facing directly towards the centre of the unit they are pursuing – the pursuers then move straight forward a number of inches equal to the amount rolled on the dice.
Note that pursuers make this move even if the fleeing unit was caught, as described earlier – the 'pursuit' move in this case represents them surging forward to cut down any stragglers.