Certain actions cards are meant to be played during the "Assignment" phase. (Our darkest hour etc.)
We have been playing them wrong (at least I think we have), since we have played them and resolved them during the assignment phase (Before going to the action phase), but I have seen others describe how they play them as a normal mission.
Using them as a regular mission doesn't really make sense to me, as you will slowly learn which cards are available to each leader, so even if you wont be able to counter them (As none of them are "attempt" missions), your opponent will be able to plan ahead, knowing this.
Our reason for doing this is the Ozzel-mission (I forget the name) which is absolutely useless, when played in this way, since it is just a "move" card, that allows you to move fleets from adjacent systems into the system where he resolves his mission.
How does this make any sense?