If a unit fails its Break test it must flee and might be destroyed as it runs.
However great the slaughter that occurred in the clash of swords, the subsequent flee and pursuit may well be bloodier still. When a unit flees from close combat, it does so with wild abandon. Warriors run from the enemy with all possible haste, casting aside anything that might encumber them and giving thought to nothing other than survival. For the pursuing unit, such warriors are easy prey, to be hacked down, captured as slaves or driven from the field of battle. A regiment that flees from combat, therefore, is almost certainly doomed. Only by outpacing the enemy do they have any chance of survival.