Using Excel for game mapping

Over the years I have developed a method of using Microsoft Excel for mapping my wargames.  Originally I started it for use with Risk, and then moved on to an on-screen version of Axis & Allies.  This is a tutorial, using the example for my forthcoming play-by-email game of Operation Market Garden.

How to use Excel for mapping wargames

Feel free to copy, enhance and play with, but please credit when passing it on.