Unless a unit contains only a single rank, its fighting rank cannot contain more characters than it does rank and file models. If it does, one or more must 'retire' from combat. Upon retiring, a character:

• Moves through the ranks to take up a position away from the fighting rank.

• Cannot make any attacks or have attacks directed against them.

• Confers no benefits to the unit in the form of Leadership, special rules, or anything else.