On the internet somewhere is thing called "Duffers drift". It describes a Brit versus Boer action. it has 3 narratives in order to illustrate various military points. Read it?
http://www.benning.army.mil/MCoE/199th/OCS/content/pdf/The%20Defence%20of%20Duffers%20Drift.pdf
Should work?
I read it some years ago and found it quite fascinating.
I was stumped about how to turn it into a game, given that the "reveal" at each iteration was really the whole point.
But educational none the less.
Agreed Simon I have looked at how to make it a game but is difficult.