Hammer Blow

Use this Stratagem in your Shooting phase,
when a model is destroyed by an attack made
by an AERONAUTICA IMPERIALIS
model with the Flyer Battlefield Role
from your army. That destroyed models
unit is pinned until the start of your
next turn. Halve the result of any Advance
and charge rolls made for pinned units. When
resolving an attack made with a ranged weapon
by a model from a pinned unit,
subtract 1 from the hit roll.