Well, I was incorrect.
Here is the problem. I'm building a fortified line. If the forts in that line go Tactical Reserve, they get no defensive bonus, right? But if the forts are in Fortified mode and are knocked out of Fortified mode due to enemy attacks, then what happens? In that case, they have zero movement, so even if they have organic engineers, they can't dig in again. So the best case would be for the fort to go Tactical Reserve, so they can at least support nearby friends.
So, the best solution is to put the forts in Garrison status in Fortified mode. That way they get Fortified defensive bonus for the initial enemy attacks, then switch to Tactical Reserve once they are knocked out of Garrison status so they can at least support nearby friends.
Sorry to waste your time with a non-issue. [However, if there ever comes a time when zero-movement units can dig in, then this becomes an issue.]
Member since May 2000 (as VictorHauser)