If a Warboss is your Army General, then once per game he may call a Waaagh! The Waaagh! may only be called if the Warboss first declares a charge, and must be announced immediately after making the charge declaration, before any charge reaction takes place. In the turn a Waaagh! is called, every combat involving Orcs (of any type) in the army adds +1 to its combat resolution for the rest of the player turn. The General himself, and any unit he joins, adds +D3 to their combat resolution instead. In addition, every unit that fails their Animosity test this turn add their rank bonus to the result rolled on the Animosity table.