Spears -> strike first on the first turn they are charged into (but not when they themselves are charging)
Cavalry - mounts do an impact hit at the strength of the mount on the turn that they charge in lieu of their normal attack characteristic per wound that they possess. Horses would do 1 impact hit per on the turn they charge. Large creatures like dragons would do 5 or 6 or whatever their wounds were to represent their bulk, but would not get their normal attacks in addition to.