SOLUTION!
I used to think the solution was to somehow work oil into the supply system but the supply system is the solution. The supply system does exactly what we need it to:
It has provinces/zones that produce supply and this then migrates to zones without supply. As long as a unit has access to supply they are fine - if they don't then they start to operate at reduced efficiency. Units in a pocket with supply can continue to fight.
Replace supply with oil:
It has provinces/zones that produce oil and this then migrates to zones without oil. As long as a unit has access to oil they are fine - if they don't then they start to operate at reduced efficiency. Units in a pocket with oil can continue to fight.
And taken one step further if this system is made generic to the point where new consumption resources can be modded in then it's pure gold:
It has provinces/zones that produce food and this then migrates to zones without food. As long as a unit has access to food they are fine - if they don't then they start to operate at reduced efficiency. Units in a pocket with food can continue to fight.
The best part is the supply system is already in game so would hopefully only require a moderate amount of work to make it generic and make sure consumption resources flowed around correctly.
So an infantry division requires 1 supply and 0 oil (to remain 'in supply')
An armour division requires 1 supply and 1 oil
A Battleship requires 0.5 supply and 3 oil
etc...
You'd need to be able to determine which consumption resources caused attrition though. Lack of supply would cause attrition and reduce fighting efficiency, lack of oil would just reduce fighting efficiency.
You'd then be able to trade your excess consumption resources to other players but I think the existing trade mechanics are perfect for this.
- Solves the oil problem
- No stockpiles
- Uses a system that is already in game and designed to do exactly what we need
- Can use the existing trade mechanics which would work just as well for consumable resources as production resources.
- Is highly moddable
Thoughts?