Expertise

Weapon expertise is a form of specialization that is available to all warriors. Regular weapon specialization (described below) is only available to fighters, but weapon expertise can be learned by other warrior classes. There’s no reason a fighter couldn’t learn expertise instead of specialization, but expertise is just as expensive as specialization and isn’t as good. Multi-classed fighters can only specialize in one weapon, and thus often use expertise.

Fighters can gain expertise in an entire weapon group at the cost of a single weapon proficiency slot.

Weapon expertise grants a character +1 to hit with their chosen weapon at the cost of one weapon proficiency slot per weapon. Weapon expertise also allows the use of any unusual weapon properties reserved for specialist use. Weapon expertise does not grant the character extra attacks per round or damage bonuses, as weapon specialization does.

Expertise

Forgotten Realms: Birthright Avanpallandt