Aggression
Setting an actor's aggression to a value higher than their disposition for any other actor will cause them to attack the other actor. A setting of 5 or below means it will only initiate combat defensively. (Meaning the 'Defensive Combat' tag attached to AI Packages have a redundant function.)
Syntax:
SetActorValue Aggression value SetAV Aggression value
Example:
SetActorValue Aggression 100 NPCRef.SetActorValue Aggression 0