As simple as the title says, just give this order a little more of flexibility, instead of only being able to damage all enemy units in the supportline, you can now choose between damaging the units in the supportline of frontline.
As sometimes you may find yourself in a situation where you have this order but you can't use it reliably as the threat is in the frontline.
Also germany doesn't have that many answers against frontline threats, so this could do nicely, or maybe not and keep this idea for a future order with more rarity and maybe higher cost.
