Units with the Run Down keyword can quickly cut down units when executing a pursuit. When using Pursue, a unit with this keyword can move through enemy units as long as it obeys terrain restrictions and ends its movement in an unoccupied hex. Enemy units that are moved through suffer an automatic hit. After moving, the unit may still make the free attack given to it by Pursue.
When performing the Pursue X Keyword Ability (X must be at least 2), the Unit with Run Down may move through enemy Units, obeying terrain restrictions and ending movement in an empty hex. Any enemy Unit passed through suffers an automatic hit (although it only counts as a single hit that would not capture a lone Commander). The Unit with Run Down may still perform the bonus attack granted by Pursue X, although the hits from Pursue X would not be cumulative with the hits from Run Down for the purpose of capturing a Commander.