For Global 1940 alternate Convoy Disruption House Rule.
HR SUBMARINE A2 first strike D1 M2 C5 IPCs,
first strike even when enemy’s DD present, no first strike roll on defense (ever)
blocked by DD on 1:1 basis Stealth Move and
on 1:1 basis Sub’s Submerged for first round only.
Any plane can hit unsubmerged Submarine during combat round without any Destroyer presence.
(If a Sub submerge during first strike phase, plane can not hit Sub.)
Submarine cannot hit submarine nor aircrafts.
Convoy Raid Damage: 1 Dice keep all 1 to 3 results AND add 1 IPC
Immediately remove IPCs from enemy’s power.
Add 1 chip under National Control Marker in Convoy SZ per IPC damage (as reminder).
DESTROYER A2 D2 M2 C6 IPCs,
blocks on a 1:1 basis Submarine’s Stealth Move, CM and NCM, and Submerge, first round only.
I would also delete Bordeaux Convoy SZ 105.
- Any Convoy SZ is to be identify with owner’s Control Marker.
All Convoy SZs worth 4 IPCs and are bordering at least 1 TT or have an island group in it.
These TTs can worth 0 IPC to many IPCs, this doesn’t change the 4 IPCs Convoy SZ basis.
Shared Convoy Sea Zone:
lf at least 1 territory bordering the Convoy SZ belong to an enemy’s Power, this Convoy SZ maximum is split in two 2 IPCs which can be both raided by the other side. So, some Convoy SZs could have two National Control Markers, one from Allied Power and one from an Axis power.
If multiple Powers from the same side share a common Convoy SZ, damages are split between these Powers, as they wish. (Same as multiples casualties in a TT or SZ.)
During Phase 3: Conduct Combat
Combat Sequence
1. Strategic and tactical bombing raids AND/OR Convoy Disruption
- During Combat move phase, each Submarine can choose whether to make a regular combat attack (Step 3. General combat)
OR
to do Convoy Raid in a given Convoy SZ (Step 1. S&TBR AND/OR Convoy Disruption).
It is only Submarine units which get this option, even if Convoy SZ is enemy controlled by warships.
Other warships and aircrafts (Destroyer, Cruiser, Carrier, Battleship) can only do such Convoy Raid if there is no enemy’s surface Warships in Convoy SZ. (Step 1. S&TBR AND/OR Convoy Disruption)
- The Convoy Raid damage roll is determined that way: 1 roll 1D6 per Sub and keep only 1 to 3 results, and add 1 IPC to the result.
(Odds: 2+3+4+1+1+1= 12/6 = avg 2 IPCs.)
(@2 first strike = up to 3 damage roll)
It gives the amount of IPCs which will be lost immediately by Convoy SZ’s owner.
Never more than 4 IPCs per Convoy SZ for the whole game round.
You put in the SZ one Country Control Marker chip under the Convoy’s SZ owner National Control Marker for each IPC damage on Convoy to keep track of the entire game round results against this Power.
Other Combat units get only 1 single dice to roll, and get Convoy damage if they get their attack number or lower:
Surface warships:
Destroyer Attack @2 Damage on 1-2. (odds: 3/6 = avg 0.5 IPC)
Cruiser Attack @3 Damage on 1-3. (odds: 6/6 = avg 1 IPC)
Battleship Attack @4 Damage on 1-4. (odds: 10/6 = avg 1.67 IPC)
Carrier Attack @0
Aircrafts:
All empty Convoy SZs are treated the same as a Tactical Raid target.
Fighter have no attack on Convoy SZ.
Tactical Bomber (12 IPCs HR) takes a Tactical Bombing Raid 1D6 damage as usual but must first submit to preemptive AA defense @1.
(Odds: 18/6= avg 3 - 2 = +1 IPC. Regular AA)
(Odds: 18/6x 5/6 = 15/6 = 2.5 - 2 = +0.5 IPC. Preemptive AA)
(OOB G40 TBR D6: +2.917 - 2 = +0.917 IPC damage/TBR)
Strategic Bomber makes a Tactical Bombing Raid 1D6+2 damage as usual but must first submit to preemptive AA defense @1.
(Odds 23/6= avg 3.833 -2 = +1.833 IPCs. Regular AA)
(Odds 23/6 x 5/6 = 115/36 = 3.194 -2 = +1.194 IPCs Preemptive AA)
(OOB G40 SBR D6+2: +4.583 - 2 = +2.583 IPCs damage/SBR)
(This is played as an IC’s AAA. Many Cargo Ships were equipped with AA guns and were more able to defend themselves than against Submarines attack.)
In addition, the 4 IPCs cap in Convoy SZ makes such Tactical Bombing Raid sub-optimized compared to SBR and TBR on IC, Air Base and Naval Base, as you can compare above.
**Do you think this alternate National Convoy Disruption for Global 1940 can be a workable balance system?
Do you see it as a sufficient incentive for Submarines Commander to prefer raiding over regular combat?**