There is no way that any sim around today can recreate a historical setup. You make sacrifices and concessions simply out of necessity. It's just a matter of how many. One thing is given, scenarios will always be LESS realistic simply because you know exactly what's coming. This is because someone attempted to recreate an event by completely forgetting that putting a bunch of people together on a computer game and giving them a few of the tools used in the "event" does nothing to actually simulate the event.