Wrath of the decimated
The Cavalry runs up (they can cover serious ground) while Rexor's spell fizzles and by the following turn are attacking the entrenched Canon crew who manage to pick off yet another Cavalryman with their handguns as they are charged. Karak, who serves as Master engineer and General does his best against the Cavalrymen using a hand weapon, can't even dent them through their thick plate and mount's barding.