Ork mobs may always choose to substitute the number of Orks in their mob for their normal Leadership value. If an Ork mob numbers 11 or more models, it has the Fearless special rule.
Models with this skill are known for the wild ferocity of their charges. In a player turn in which they charged into close combat they and +1 to both there Initiative and Strength characteristics. This ability does not affect sweeping advances.