Whilst hunting around cyberspace looking for maps suitable for war games campaigns I discovered this gem. It was an account of a war-gamed 1806 Campaign in Prussia, played, I believe, as a kind of kriegspiel. There is probably a back story I couldn't find, but the narrative beginning from this link is enthralling:
Pawnderings on Games: 1806 Campaign
I really have nothing to add to this. Enjoy!