Shield walls

Three or more trained fighting characters forming a shield wall gives an additional +1 AC shield protection to every member of the shield wall.  However, while in a shield wall players cannot make use of the shields shall be splintered! rule.  Movement is also reduced to one half due to the coordination required to maintain the shield wall.

The shield wall and the attendant bonus is broken if any member of the shield wall breaks formation (retreat, fails a morale check, is felled, etc).