I'm not posting this in the general thread: if people find it then fine but it has tactical significance.
First off, it's worth explaining the mechanics of fortification and undermining so that everyone has them clear.
A control system has two metrics of note: income and upkeep, both measured in command capital (CC). In a normal situation the upkeep is subtracted from the income and the remaining CC is available to the power to use for expansion in to prepared systems.
If a control system is undermined then the entire income is lost. The upkeep still has to be paid, and is removed from the overall CC budget.
If a control system is fortified then the upkeep is reduced to 0. The overall CC budget is hence increased.
If a control system is neither fortified or undermined, or both fortified and undermined, then the normal situation prevails.
To give you a current example: Amenta has an income of 142CC and an upkeep of 23CC for a profit of 119CC. The possible situations for it are:
- Fortified: upkeep goes to 0 so profit goes to 142
- Undermined: income goes to 0 so loss goes to 23 (as the upkeep still has to be paid)
- Neither: income and upkeep unchanged so profit stays at 119
There are possibilities for both defensive and offensive actions. A defensive action is to fortify a control system so that the owning power will either spend the default number of CC on upkeep, or 0. An offensive action is to undermine a control system so that the owning power will either spend the default number of CC on upkeep, or lose the entire income *plus* pay the upkeep from their other CC budget.
Because of the way that the mechanics work the best strategy is to
fortify early and undermine late. Once a system is fortified the effort involved to undermine it is relatively large for the deduction in CC that it gives us. Conversely, if a system is not fortified then the effort to undermine it can yield great rewards in terms of reducing, possibly severely, the number of systems which can move from preparation in to expansion.
The good news is that as a power we appear to treat fortification with the importance it deserves, resulting in few opposing powers bothering to undermine us. And the even better news is that a number of opposing powers don't seem to care about fortification quite as much. There is much to be said for a Wednesday evening push to undermine systems of our neighbouring powers who have been lax in this regard, as regardless of how much the prepare a system if they don't have the CC to expand in to it then it wont move in to expansion state and they will lose all of the effort they put in to it. I don't think that the benefits of this occurring can be emphasised enough.
One other thing: ALD is in a great position because of the number of high-quality control systems she has we have a surplus of CC and so if a few systems go from fortified to neutral it won't hurt our expansion. A few of our nearest powers aren't in such a fortunate position, and selective undermining of their systems late enough in their cycle could cause them serious damage.