Phalanx Fighting
( Complete Warrior, p. 103)[Fighter Bonus Feat, General]
You are trained in fighting in close formation with your allies.
Prerequisite
base attack bonus +1, Proficiency with a heavy shield,
Benefit
If you are using a heavy shield and a light weapon, you gain a +1 bonus to your Armor Class. In addition, if you are within 5 feet of an ally who is also using a heavy shield and light weapon and who also has this feat, you may form a shield wall. A shield wall provides an extra +2 bonus to AC and a +1 bonus on Reflex saves to all eligible characters participating in the shield wall. For example, a single character with this feat gains a +1 bonus to his AC. If two or more characters who all know this feat are adjacent, they each gain an extra +2 bonus to AC (for a total of +3) and a +1 bonus on Reflex saves.
Special
A fighter may select Phalanx Fighting as one of his fighter bonus feats.