Model parts with Frenzy have +1 Attack and are Immune to Psychology. After all charges have been declared, each of your units with one or more models (or model parts) with Frenzy must take a Frenzy Test (Leadership Test) if it did not
declare a charge. If the test is failed, the unit must declare a charge against the closest viable enemy unit, if there is one.
Characters are never forced to charge out of units. Units with one or more model parts with Frenzy must always pursue and overrun whenever possible. If a model part with Frenzy is ever on the losing side of a Combat Round, it immediately loses this special rule.