A unit does not receive combat result points for extra ranks and cannot be Steadfast (see Loser Takes a Break Test) as long as it is disrupted.

A unit is disrupted if one or more enemy units are attacking it in the flank or rear, and those enemy units have a combined Unit Strength equal to half or more of that unit.

Sometimes, an enemy unit will begin the round of close combat with enough Unit Strength to cause disruption, but takes enough casualties so that it has below half Unit Strength compared to their foe. In this case, it can no longer disrupt the unit it is fighting and the extra ranks are counted as normal.

Example: Unit a has Unit Strength 20 and is flanked by Unit B with Unit Strength 10. Since Unit B has half the Unit Strength of Unit A, Unit a is now Disrupted.