Charging into the enemy gives a considerable advantage, which is increased when charging into an enemy's vulnerable flank or rear. To represent this, models gain a modifier to their Initiative characteristic during the Combat phase of a turn in which they charged (to a maximum of 10):
Charging an enemy in their front arc: +1 Initiative per full inch moved (prior to making contact), to a maximum of +3.
Charging an enemy in their flank or rear arc: +1 Initiative per full inch moved (prior to making contact), to a maximum of +4.