From publisher blurb:
Let slip the hounds of war!
Make martial combat more interesting with the Path of War, a maneuver-based combat system designed and playtested to work side-by-side with all of the standard classes.
Path of War offers new base classes, feats, archetypes, and much more. Want to use the maneuver-based combat system with your standard Pathfinder Roleplaying Game classes like the fighter or rogue? Feats allow you to do just that.