I think we've all lost focus on the main point of this thread. In "Chain of Command," Admiral Nechayev flat out says that the Cardassians are thinking about invading Minos Korva because they believe the Federation won't risk war over one star system. She goes on to say that they, the Cardassians, might be right. So, in other words, the UFP is seriously considering not going to war, at all, with Cardassia even if there is an invasion.
I think we can all agree that this is a pretty weak foreign policy.
IMO, it also shows that the Federation has failed utterly in dettering aggression. The Cardassians feel they can get away with an invasion and occupation of UFP terrority. The fact that they would eventually get their asses kicked is meaningless. If the Federation had done a better job of showing force and deterring them, the invasion would never have been considered. And by "showing force and deterring them," I mean making the Cardassians, or any other Alpha Quadrant power, believe that such an action against UFP interests would result in dire consequences and then following up with those consequences should the need arise.
The best offense is a good defense. The Federation clearly didn't live by that motto in "Chain of Command." They were lucky that Jellico and the Enterprise crew were able to find a way to work the situation into the Federation's favor.