(vs Normal AI)
I had taken and heavily fortified a region--it was a chokepoint, the AI behind it could be ignored until I had dealt with the others. My guns just reached to the center of the next region. The AI of course kept engaging in futile attacks.
What was surprising is the number of times I saw it fire orbitals at it's region. Apparently it saw all the dying units as an indication that I was attacking the region and it was attempting to nail my forces. The thing is, it was my fixed defenses, I wasn't actually threatening the region at all. (And it was an exercise in futility anyway--the region was one of the linking ones without resources of it's own and I owned all the downstream regions it linked to. The AI shouldn't waste orbitals on defending a region that isn't currently useful.)