It was assembled from many postings on rec.games.miniatures. The following advice is generic and can, for the most part, be applied to any of the games systems produced by Games Workshop. Please note this is intended to be a general guide. Detailed guidelines for specific armies and units are not included. You will have to do some analysis of your own in order to apply these basic techniques.
Strategy is how to gain an advantage in a war involving planning and campaigning.
It involves establishing overall goals for the war, assigning forces and defining Missions Tactics are how to gain an advantage in actual combat, in the heat of battle. This includes techniques for achieving Mission objectives. In this FAQ I use the word strategy to deal with issues such as building an army, creating battle plans and, in general terms, how to win a battle. I use the word Tactics in reference to specific combat techniques more akin to the combat roles mentioned in the planning section. In attempting to create balanced forces, Games Workshop usually enhances one skill at the expense of something else.