From the rulebook: Strategy 1 is not one game; rather, it is a whole system of games/simulations of the widest scope, embracing as it does the range of military-political conflict from the time of Alexander the Great up to the present and into the future.
This is the set of rules our group uses. It has our House Rules integrated into the rules. This rule set has benefited from a a couple of playtests and a lot of discussion. We hope they will be stable for some time and a good starting point for anyone else interested in playing. If you are interested in just having the original rules with an earlier version of the house rules separated out download the other file.