Something that comes up in the Monmouth historical accounts is the deadliness of the Enfilading artillery fire off Combs hill along the hedgerow.
Given the relatively small scale of Tricorne, it struck me that artillery fire could reflect this by allowing artillery fire to attack the target hex AND every hex behind the target hex along the line of fire. So using the Monmouth scenario as an example, if a full strength Continental artillery on Combs hill fired at a British unit 2 hexes away, it would use 3d (as normal), and then attack the next unit behind with 2d and so on until the range was exhausted.
for example
wouldn't apply to Melee combat or battleback (cannister fire).