Reach
(Rule)Description: If Engaged with a Detachment, a model with a weapon with the Reach trait can choose to Fight other models within 2" of it that are not already paired off against another model, have not fought this round and are in the same Combat. The controlling player decides which model(s) it fights and can do this one at a time after resolving a Fight.
If both players have models with weapons with the Reach trait, the player with Initiative resolves any additional Fights first.