Campaign Difficulty

Are there any settings by which to adjust the difficulty of the campaign in CFS3?
In campaign mode my pilot has a fatigue and health status shown but they never seem to change much. Fatigue is consistently "0" and health never dips by more than a point or two. I also notice that there is always a 3-5 day period between sorties, so it's not surprising my pilot doesn't get tired!
I have looked in "settings" etc. but I can't find anything to adjust. Having all that time pass between missions whilst the enemy remains active just doesn't seem plausible. If anyone has any ideas about this I would welcome hearing about them.
In campaign mode my pilot has a fatigue and health status shown but they never seem to change much. Fatigue is consistently "0" and health never dips by more than a point or two. I also notice that there is always a 3-5 day period between sorties, so it's not surprising my pilot doesn't get tired!
I have looked in "settings" etc. but I can't find anything to adjust. Having all that time pass between missions whilst the enemy remains active just doesn't seem plausible. If anyone has any ideas about this I would welcome hearing about them.