Found this on the Larry Harris Forum and haven’t seen any corresponding conversation about it here as yet. It comes from Mr. Harris himself, so I was thinking that it might be more optional play rules as compared to House Rules, being from ‘the man’ himself. I trust the moderators here though to move or not move if needed.
This is straight from his post, except for the italicized portion- that comes from a later post by LH which I included where he was talking about adding it.
The original post and discussion can be found here:
http://www.harrisgamedesign.com/bb2/viewtopic.php?t=11
http://www.harrisgamedesign.com/bb2/viewtopic.php?t=388
D-Day Optional Rules by Larry Harris
Optional Play # 1 Artillery
Call it: Dimensional Battlefield - ARTILLERY
The system will require 2 additional cards. Number them 9A and 11A. When playing this system simply add these two cards, in numerical order, to the deck. You will have to make your own cards and insert them in the deck.
Card 9A Reads (This follows card 9):
Allied Artillery Fires
Artillery can target specific enemy units.
It can fire at adjoining zones.
Hits with rolls of 1 or 2 **
Card 11A Reads (This follows card 11):
Axis artillery Fires
Artillery can target specific enemy units
It can fire at adjoining zones.
Hits with rolls of 1 or2 **
Artillery can fire (roll) against enemy units in their same zones or enemy units in adjoining zones. The controlling player can designate specific units as targets. A hit will immediately remove the targeted unit.
When conducting combat (Cards 11 & 13) artillery units do not roll either offensively or defensively. As their dedicated cards may suggest, they have their own special moments. They can be attacked if the region they are in is attacked. If they are selected or targeted as the loss they will be removed.
Additonal
When artillery fires and hits; on a roll of 1, the attacker chooses the unit destroyed, on a roll of 2, the defender chooses the unit to be destroyed.
Option # 2 Naval Bombardments
Naval Bombardments (card 2) - The Allied player should be able to roll against any enemy units of his choice – not just blockhouses. This is restricted to only the coastal regions ranging from Barfleur to Auberville (the bay).
Optional Play # 3 Attack or not Attack
During an attack phase a player can elect NOT to attack in some or all contested regions. For example a single unit in a region facing a greater number of enemy units might better be used only defensively. If it were required to attack, its elimination would be assured when the opposing player, in great numbers, rolled back defensively.
Continued Play
Another possibility…After turn 10” Each Army (German American and British) rolls a die. The number rolled is the number of reinforcement units that can appear on the board this turn. Following the silhouettes on the BOTTOM of the reinforcement charts. Reading them from RIGHT to LEFT place those type of units on the board. If you roll a 6 you receive no reinforcements that turn.