So I am preparing for an upcoming Only War campaign, which will focus in the liberation of a world from Xenos occupation. One of the things I plan on hitting the PCs with is a rather liberal awarding of fatigue. My idea is that as they are coming of the line here and there, they start being faced with the choice of plugging the rumor mill for information, making logistics rolls for gear, OR resting. Later on when I actually have them deep in enemy territory, they will be forced to actually balance rest to do away with fatigue points and conducting patrols. I think this gives a very grim sense of realism to the game.
I was wondering if any of you have done similarly in your own games?