Hold the Line

(Sword and Fist: A Guidebook to Monks and Fighters, page 7, DnD 3.0)

[General]

You are trained in defensive techniques against charging opponents.

Prerequisite

Combat Reflexes, Base attack bonus +2

Benefit

You may make an attack of opportunity against an opponent who charges you when he enters an area you threaten. Your attack of opportunity happens immediately before the charge attack is resolved.