Fenixp: Just thought it's worth pointing out that it's not actually directly implemented in-game.
And you are completely correct, I based it on my memory of playing the game(s).
I had totally forgotten I had actually enabled it manually.
It's too bad (but understandable) that they implemented that checkpoint save system in 3.
Personally I like 'save scumming' to try different strategies, which in this case meant I had to die in order to respawn near the base I was trying to stealth conquer.
Which actually failed once because in one instance as I was mucking around and dying a bear ran into the base and killed everyone, which made the base conquered animation play and autosaved the game.
Still, Hitman was worse because of that same reason. I loved scumming my way through the first games (unless I'm remembering that wrong).