Since
@Artemis1992, was specifically asking, here is what I've been at. I added a rudimentary province system to my simulation so that we get a better sense of unit location. At the same time, I gave units the ability to do long-range strikes (provided they have the necessary capabilities) so that they can skirmish with things outside their own location.
Had to rewrite a lot of battle-code for that, since now everything needed to respect location on the worldmap and I needed to be careful to not introduce any circular dependencies that would blow up later.
Some stuff is still missing from this step. I have no actual movement from province to province and I need to rewrite the retreat logic. I'm also still thinking about the exact mechanics to escalate skirmishes into full battles, as the long-range attacks now mean that the unit performing the strikes should be more careful about it. So far, it was assumed that the attacker always wanted a battle (why else would you have forces in a province where there are enemies?) but this does not make sense when doing terror attacks. I mean, a Dauntless-class vessel wouldn't mind to throw down with a fiendish host or two, but said fiends might not want to pick fights while heavily outnumbered when they are doing deep-strikes with Greater Teleport.
For now, here is a report for what it looks like when a bunch of Devils can suddenly exploit their SLAs for tactical strikes.