I have made a new Category of Early 20th Century which now incorporates World War 1 and they can be viewed seperately now.

If I ever finish completing the transfer of all the categories I may refine further for Spanish Civil War, Russian Civil war, Aerial and Naval for all rules. However the first priority is the transfer of all the rules and so far about 230 completed and some links from old site have been amalgamated when they are variants of another of free rules (for example see Storm of Steel ).