How close to your land force limit do you have built during peace?
Well... best is to have forces over the forcelimit by a little, so others fear you. But during peace, keep the MAINTENANCE low.
Maybe I was daydreaming? No, seriously I am pretty sure it did happened.
Edit:
I remember my reaction was like:
Come on, now when I have cores on each province?
Seriously, i dunno, but try repeating it.