Models with this special rule cause Fear:

• If a unit wishes to declare a charge against an enemy unit that both causes Fear and has a higher Unit Strength, it must first make a Leadership test. If this test is failed, the unit cannot charge. It does not move and is considered to have made a failed charge. If this test is passed, the unit can charge as normal.

• If a unit is engaged with an enemy unit that both causes Fear and has a higher Unit Strength when its combat is chosen during any Choose & Fight Combat sub-phase, it must make a Leadership test. If this test is failed, any models in the unit that direct their attacks against the Fear-causing enemy suffer a -1 modifier to their rolls To Hit.

A unit only needs to make one Fear test per turn. Models that cause Fear are immune to Fear. A unit that does not cause Fear does not become immune to Fear when joined by a character that does.