How much should we know ahead of time?

[Havoc]

You have to assume your opponent is familiar with the battle, if not the scenario. I learned a while ago when I was blindsided by an opponent with a very lopsided game scenario to at least review the scenario for relative strengths, objectives, and starting victory point score. This allows me to determine my real objectives in a game, as going for the victory points is not always the answer. Often I will ignore the assigned victory hexes and go for destroying my opponent's army.

If you want to increase fog of war, play the full campaign scenarios in games like 'Five Days in April'(Eckmuhl) or 'Six Days in October' (Jena-Aurstadt) with extreme FOW settings. Long games (360 and 524 turns respectively), but you won't know where they are and will have to fan out the hussars to find them... just like the real campaigns.